Although our post Moogfest event was altered due to lack of electricity, iBoD did regale our audience with an acoustic improv for about a half hour. Eleanor and I played the tank bells, while Jim played his horn and Susanne played Native American flute.
Towards the end, it was suggested that Eleanor and I get two of the smaller tank top bells going like singing bowls, while Jim and Susanne improvised over them. The harmonics were so dense that we had a lot of fluttering beats moving in and out, which I loved. You will hear traffic creating Doppler effects, chattering people and birds, and the beating of some very big wings!
Here is that improv which I named Cosmic Iron Butterfly:
Nature’s Chord is an organizational framework for all frequencies, AND any periodic reoccurrence can be converted to frequencies and studied as this patterned relationship. In his book The Cosmic Octave, Hans Cousto, the maverick mathematician and scientist, demonstrates the formula for converting any periodic function to an audible frequency. He explains that “The period of oscillation and its frequency stand in a relation of inverse proportionality, thus period = 1/frequency and frequency = 1/period. The reciprocal value of a period of time represents its frequency…” You find the reciprocal value of a given period by dividing the number into one. This value is then multiplied by 2 until the number reaches the audible frequency range. Then you can find the tonal correspondence to the periodic function that you just converted.
For example, the speed of light is 186,000 miles per 1 second. “Miles per second” is a dead giveaway that this measurement is a periodic function. (Actually almost any measurement would qualify.) 1/186000 = 0.000005376344086 x 2 to the 25th power = 180.4 hz which is F#/185 hz (-3.6 discrepancy). So the tone for the speed of light is F#. Cousto converts time periods (days, years, etc), planetary orbits, distances between the stars into frequencies. The mathematics point to a potential resonant frequency for any periodic function.
In a recent blog post on The Law of the Octave, I pointed out that our Universe is held together and moved along by vibrations. Even a cursory reading of contemporary quantum physics supports this idea. Nature’s Chord allows access to and influence upon the vibrational Universe. As a painter of sound, a lover of diversity, and a harmonic healer, this is one exciting discovery. This is a way to sonify and present information, bring the resonant frequencies of relationships into harmony, and generally engage with the overall vibration of any situation.
So, I am looking around for periodic data to sonify using the Law of the Octave and Nature’s Chord/Scale. In 11th Harmonic, I used the reveletory research that Dr. Anthony Holland presented in his TED talk on the use of the 11th harmonic in “disrupting ” the cellular structure of tumors. Of course, the frequencies he is dealing with are super high electrical frequencies. When we apply the Law of The Octave, the electrical frequencies can be converted into audible frequencies. Then through the template of Nature’s Chord, we discover that the 11th harmonic is the fifth above the Fundamental Frequency in the fourth harmonic octave. So the 11th Harmonic soundscape begins with those long spacious intervals. I chose four whole tone tetrachords and then paired them with the fifth in the fourth octave. Within the first four octaves of Nature’s Chord lies two more fifths and the third and flatted seventh. When you start swinging these intervals around, more tetrachordal relationships emerge. It is a firework of harmonics when moving quickly, then a luxurious web of sound swaying in the breeze at slower paces. Here is a little excerpt of 11th Harmonic as played on April 4th to reset the time fractal and disrupt the stuck energy behind war and violence.
And, sure enough, Trump bombed Syria. (And the butterfly flaps its wings.) The 11th Harmonic disrupts and moves the energy without any particular outcome except dislodging and moving the energy. (Which is why Dr. Holland does not say the 11th harmonic “cures” cancer. It disrupts the integrity of the cancer cells.) And, at the same time, Nature’s Chord and the Acoustic Scale express beautiful, harmonious sonic relationships, within which the change is happening. That is the vibe! As these magical relationships are expressed with open-hearted loving intentions, entrainment happens and the vibration rises up. And, it happens in mysterious ways. Entrainment is alot like God, like Love.
While I was writing this post, Trudie asked, “Did you know that the Hindu creation myth says that the world was created through sound?” No, I did not! Research revealed several Hindu creation myths – hooray for multiple potential beginnings without needing one to be right! Here is one of the creation stories from Hindu mythology.
Before this time began, there was no heaven, no earth and no space between. A vast dark ocean washed upon the shores of nothingness and licked the edges of the night. A giant cobra floated on the waters. Asleep within its endless coils lay the Lord Vishnu. He was watched over by the mighty serpent.
Everything was so peaceful and silent that Vishnu slept undisturbed by dreams or motion. From the depths a humming sound began to tremble, Aum. It grew and spread, filling the emptiness and throbbing with energy.
Aum, or Om
The night had ended, Vishnu awoke.
History is, in part, the periodic oscillation of humanity falling asleep into the larger, darker dream and then awakening into the light of self-awareness. We are riding the wave of an awakening time right now. Pay attention to what and to whom you give your attention. Our moment -to -moment awareness is our most valuable currency. Do not squander it on guilt and sacrifice. Do not squander it on exploiting and manipulating others. DO, yes, DO give your attention to all that is in your present moment. Give it to the joy, beauty, harmony, pain, suffering and dissonance that is within each moment of our existence. Breathe. Wait for instructions. Remember vibration. Dance and sing, move and vocalize however you are able. (In the head works, too)
To form an octave is to double or halve a given frequency.The Cosmic Octave Cousto
When asked what one piece of information represented the most important knowledge humans possess, Richard Feynman, the remarkable mathemetician/physicist, replied:
Everything is made of atoms.
Indeed! What an amazing discovery! While the atomic structure and molecular composition vary from one object to the next, from one human to the next, from one star to the next, still – Everything is made of atoms!
But wait! There is more! Atoms are comprised of electrons that orbit a nucleus. And atoms are primarily “empty” space. Yet this moving, spacious world of Everything appears to human beings as material form. Even our earth suits have an animate integrity. What holds all of this together? Within these “building blocks” lies a deeper cohesion, a durational measurement, a simple, but pervasive infrastructure for all of Creation – the oscillation.
An initiating gesture, rising to a peak, falling past the midline to trough, and rising back to the midline beginning – motion across/around a central axis – a cycle, one complete oscillation. (The actual measurement is from peak to peak = one cycle) Put a bunch of oscillations together in a periodic sequence, and you have frequency. Frequencies, along with resonance, consonance, dissonance, hold the world together AND move us through our experiences. While our reality appears solid and stable, it is actually in constant flux driven by frequency oscillations. Oscillations are the pervasive movement pattern that weaves together what we call “reality”. From the quantum, to the electromagnetic, to the world of form, all of existence is waving at and through us. If this is true, then frequency is a portal into and through all of existence. And this portal is accessible and useful due to the Law of the Octave.
A vibrational frequency is known through a measurement called hertz. Hertz expresses the number of oscillations per second. One oscillation per second is 1 Hz, twenty-five oscillations per second is 25 Hz, and so on. Vibrational frequencies reveal the world to us through our senses. Everything we hear, vibrates at 20 Hz to 20,000 Hz, which is the audible spectrum. Everything we see is vibrating between 400 Trillion Hz and 750 Trillion Hz, which is the visible spectrum of the electro-magnetic field. The entire electro-magnetic field is a vibrational gift basket of frequency bandwidths that give us telegraph, radio, television, mobile phones, internet, and the electricity to power it all. And then when we go deep into the building blocks of matter, what do we get? – more oscillations.
According to the Law of the Octave – every frequency is entangled with its half and its double. Any known frequency can be calibrated as an audible frequency or visual frequency or x-ray frequency, simply by dividing higher frequencies by 2 and multiplying lower frequencies by 2. In the book The Cosmic Octave, Hans Cousto argues that the octave is a unit of measurement that can be useful in understanding and working with our very existence. Using a simple mathematical formula, Cousto converts all manner of measureable phenomenon to audible tones. (More on that in a future post.)
The audible frequency range demonstrates clearly how The Law of Octave works. A frequency of 440 Hz is the infamous Concert A- multiply 440 x 2 and 880 is also an A tone. The frequency is higher, denser, more oscillations per second, but it is the same expression as the 440 – it also is an A. Divide 440 by 2 and you have 220 Hz – also an expression of an A note. This suggests a repetitive pattern that is renewed each time it doubles or halves. This is a moment of return, an opportunity to begin again. I am wondering about The Law of the Octave as a jumping off point in the design of all kinds of fractals (mostly sound fractals).
And this is just the beginning, as there are other factors informing my fractal understanding, including Nature’s Chord, the Golden Mean, and Fibonacci numbers.
For now, The Law of the Octave and its relationship to the movements of the Universe are enough to ponder.
I have a friend whom I have not seen in many decades. We now communicate on Facebook. We shared a connection in high school, then I moved away sophomore year. I am not good at maintaining long distance relationships – being a right here, right now kinda girl! The present moment is very full, but I want to expand my awareness to include those I love who are not in my immediate proximity.
My friend had a difficult and painful 2016. She surrendered much, participated in great healing and is moving through the experience with much love and gratitude. She is in my thoughts alot these days. We have shared jokes and love memes on Facebook. She has listened to some of my soundscapes and is open to the vibrations. I wanted to create a soundscape for her journey.
I have not heard from her in a while and I am sending waves of loving vibrations her way via the soundscape entitled Carried Wisdom.
bottom over top reaching for the other side a fold will occur
the fold will happen the containment – unlikely Emily, you know!
Glenna Batson put forth this idea of exploring the fold as it pertains to moving bodies. I was intrigued by the various qualities of a fold and how these qualities could be rendered in sound. Sound is a wave, which has the movement of folding, the curving back toward self that starts a fold. The rising and falling in an arc, that is the trajectory of a fold, can be rendered in the rising and falling of pitches. Voices and phrases can overlap just as half the sheet lays over the other half when folding laundry. This can be sonically rendered with staggered phrases or long reverb tails. Then there are types of audio filters that pull frequencies out of the spectra, creating folds. And the acoustics of the room create patterns of sound wave reflections that interfer with each other to create “comb filtering” – literal, periodic folds in the frequency spectra. I explored all of these sound folding techniques during the first three Human Origami workshops that Glenna and I offered.
This is what I have learned so far.
While “comb filtering” is considered less desirable by audio engineers, as a sound folding technique, it works. I measured the effect in the first workshop at The Carrack Modern Art Gallery. Positioning a speaker directly at the windows created strong early reflections, which generated visible comb-filtering in the recording. The workshop participants might not identify the phenomenon, but they did come in contact with it. Given the behavior of sound waves, I trust that comb-filtering will happen and do not worry about creating it.
Rising and falling, overlapping, and reaching back (all actions associated with folds) can be orchestrated musically. One technique used to create “reaching back” is to feature overtone harmonics. By this I mean, playing the interval notes to a fundamental tone in the octave in which they naturally occur in the harmonic overtone series for that tone. For example, the first harmonic in a series is the octave above the fundamental, now we are in the second octave above the fundamental where we hear a fifth then the next octave tone. In the third octave we hear the third and flatted seventh. The fourth octave layers in the second and the raised fourth and the sixth. Normally when these intervals are played over one or two octaves they are heard as chords. Articulating them in their natural harmonic series “home” octave creates a harmonic reach over multiple octaves, and a fold back in reference to the fundamental tone. An example of this technique from the Folding/Unfolding Soundscape:
Here is an illustration of the harmonic series for the fundamental tone C – you can follow the notes up to see that the familiar intervals of the Solfege scale mostly play out over the four octaves above the fundamental note.
As you can hear in the example, stretching across multiple octaves creates a spacious reach into very high frequencies which refer back to the fundamental tone, thus creating a sonic fold.
Rising and falling is orchestrated through pitch relationships moving up and down a scale. To my ear, the feeling of the fold is greater in less resolved intervals – thus using the fourth or sixth interval as the turn around note in the rising and falling line has a stronger sense of folding. Duration of tones in the run and their rhythmic relationships allow for a vast pool of material to be used in a folding soundscape. Stagger these lines in relation to each other and you have overlap – another aspect of a fold. Using these orchestration concepts, the folding soundscape was born.
After creating and playing folds in a soundscape for many months, I noticed two fold forms emerging from the mix. One was an echo, where the sound comes back on itself like two halves of a folded sheet. (The echo is heard in both audio examples in this post) Another fold form is the spiral, where the feeling of the sonic movement is this perpetual reaching towards the fold, but never completing it. This fold is clearly illustrated in the TRIC* samples used in the last Human Origami workshop. You will hear a spinning quality in the music that comes from a pulse rather than a downbeat. Here is an example with many layers of spiral folds. This is rather long (nearly nine minutes), and I think you will benefit from listening to the entire movement. Be sure to listen from 7:30 to the end. Great example of the spiral fold:
As we’ve continued on this investigative journey into Human and Audio Origami, each workshop participant has engaged with the soundscape, with Glenna’s keen guidance, with paper/fabric, with the cells of their own bodies in wholly different ways. All our relations are brought to the table, as bodies wrest back control from the mind in order to create space for being. Folding requires an inward turning that is a missing link in the lives of many. I invite you all to join us. I will keep you posted as to our next offering.
In the meantime, feel free to download the soundscape for free. Listen as much as you like! With great love and joyous affection at this turning of the year.
*Terry Riley’s In C as a package of notated samples.
Moogfest 2016, which took place May 19 – 22 in Durham, was a mind-blowing and inspirational experience for me. Last Fall, while selling my old instructional drumming CDs to the now-defunct Nice Price Books, I was talking to the owner about my new love: electronic music. He said, “You must be super excited about Moogfest coming here!” “Oh, yeah”, I responded, knowing I should be excited but just not feeling it yet. A few years earlier I wanted to go to the festival in Asheville, NC when Brian Eno was featured. But then I read how you spend all this money on a ticket and might not be able to get in to see what you came to see. So I knew about how the tickets worked, and that it was a celebration of Bob Moog, a synthesizer pioneer. The Moog Factory is still a fixture in Asheville, but Moogfest was coming right to my front door.
I was still feeling ambivalent in April and Moogfest was 6 weeks away. One thing I had decided – I wanted to be involved musically – so I started planning a Post-Moogfest event for the final day after everything “official” was over. (See post: http://wp.me/p5yJTY-ci) Then a volunteer application came my way, I filled it out and attended my first volunteer meeting. I met Wilson, Hugh, Robin, Ilsa and several other sweet, friendly folks who were psyched for the event. Bianca Banks, the volunteer coordinator, gave us postcards and Moogfest stickers (everybody LOVES stickers) and a welcomed us to the Moogfest family. Sweet!
The only acts I knew in the line-up were Laurie Anderson and Sun Ra Arkestra. By this time, Sun Ra Arkestra had cancelled, so I started YouTubing the artists to get a taste of what they had to offer. I started with the women artists: Julianna Barwick, Grimes, Suzanne Ciani, Grouper, Julia Holter, Laurel Halo, Olivia Block, Paula Temple. I did not get very far in this exploration before Moogfest was upon me and I just had wing it.
The first day, I worked guest check-in with Michael Jones (or Jones Michael, his producer moniker: check out his Soundcloud – https://soundcloud.com/jonesmichael), Nico and several other young musicians who told me about groups they were excited to hear. Volunteering took 18.5 hours of the weekend, and got me free admission into the festival – way worth it. I learned that hospitality is not my skill set (My partner, Trudie said, “I could have told you that.”) I learned that there are lots of folks, young and old, poor and rich, out there creating vibrations in the form of music and sound. I learned that people who come to Moogfest are – for the most part – friendly, open and excited about the prospects of technology and music making.
Luckily, Jim Kellough recommended several performances to me on the first night that were fantastic. His first recommendation was Silver Apples, a staple of the NYC scene since the sixties. Silver Apples was an early electronic duo who played the soundtrack for the moonlanding as it was broadcast on a big screen in Central Park in 1969. Now Silver Apples is just Simeon (his drummer died in 2005) and he really rocks the synthesizers. Here is a picture of Simeon with The Soundman AKA Christopher Thurston at Motorco the night of his performance:
Christopher and Silver Apples, Motorco, May 19, 2016
After this show, I headed over to see the best music of the whole weekend. Arthur Russell’s Instrumentals was inspired by the nature photography of Yuko Nonomora, and was only performed five times in Russell’s short life. The group, playing under the direction of Peter Gordon, was comprised of Russell’s collaborators and cohorts, including Peter Zummo, Rhys Chatham and Ernie Brooks. The piece was jazzy, funky and took the listeners on a fabulous journey. My favorite part was Peter Zummo dancing around the stage and gently clapping his hands whenever the trombone had a musical hiatus. Their performance left me curious to check out more of Russell’s work.
Moogfest is all about synthesized sound. So on Saturday, I headed down to The Carrack to hear Antenes, who crafts old phone operator switchboards into sequencers and synthesizers. She performed on her DIY synths for a half an hour and then did a presentation on how she came to create these particular instruments. I loved the deep sweeps and blips and bloops she carved out of various oscillating waveforms. Next stop was the Pop-Up Moog Factory, where employees were building actual Moog Synthesizers right before our eyes. The employees worked at four stations performing assemblies and passing them on to the next table. By midday Saturday, they had assembled 14 Minimoog Model Ds. The factory was full of a variety of synths hooked up to headphones so people could play and experiment to the ear brain’s delight. I had a fantastic several hours there, and left feeling like I really need a synth to add to my setup.
Then I checked out Critter and Guitari, who were in a geodesic dome tent outside the DPAC. These Booklyn-based musician entreprenuers have created adorable little synthesizers that are just my style. I enjoyed playing with the Moogs, but they are expensive and heavy. (Dang, I do not need anymore weight in my setup with a 12″ QSC K Speaker to haul around.) I enjoyed jamming with the guys , the other peeps, and the train that passed by. Their Organelle allows you to dial up a variety of sounds, play them polyphonically on a little wooden button keyboard, and tweak the sounds as you go. Neat! In my fantasy, they offer to give me one to play as a sponsor of ibod when we go on our sound sculpture tour. Wouldn’t it be nice…
I was anxious to get a good seat for Laurie Anderson’s Saturday afternoon performance, so got there waaaay early only to discover a long line snaking around The Carolina Theatre. I got in it only to discover the line was for a talk by Jaron Lanier, whose name I did not know. The guy in front of me did not know him either, but he figured “He is the keynote speaker, he must be good!” As it turned out- he was right! Jaron is a musician, virtual reality geek, author and incredible human being. He started his talk by playing the khene, a Laotian mouth organ, that he said is a “digital” instrument thousands of years old that could have inspired the invention of computers. Here is a YouTube video, where he plays this instrument in his own amazing way:
His message was wonderful and optimistic. He said we need to “will away” our obsesssion with war, combat and all things military. He advocates a movement toward kindness and beauty as guiding values in technological development. He asked VR game makers to use the technology to engender empathy. What I heard was – let us play games that engage our emerging polyvagal brain rather than continuuing to stir up our shriveling reptillian brain. Jaron Lanier is one gorgeous genius, and I was uplifted and inspired listening to him.
Next up was Laurie Anderson, who grabbed her electric violin, slung it over her shoulder and and filled Fletcher Hall with deep sweeping harmonics that made my heart pound. She moved toward the audience as she continued playing, looking right at us. This connecting more openly with the audience is a shift in her performance aesthetic from times I have seen her over the past twenty years. The next day, she talked about “seeing the audience” during her presentation/interview. While I enjoyed her performance, I was mesmerized by the retrospective talk about her work on Sunday. I love hearing and reading about artistic process. It is extremely intimate discourse, which is why many creatives are reluctant to share it. Laurie gave us a glimpse into her process over the years, and for that I will be forever grateful.
She spent a good bit of time talking about a recent work Habeas Corpus and how the piece evolved into an illumination of and a step toward healing the horrors and injustices of Guantanamo Bay. The work was presented in 2015 in NYC and is based on the experience of Mohammed el Gharani, the youngest detainee at Guantanamo Bay. He was sold to the US at the age of fourteen, kept in solitary, subjected to torture, and finally released by a US District Court judge for lack of evidence. He was held for seven years. The performance installation included a plaster cast chair the size of the Lincoln Memorial. Mohammed’s full body image was projected via a live video feed from Chad, where he now resides. He sat in the chair and told his story. The audio was one way only to protect Mohammed from hearing any personal attacks from the American public – there was concern that those Americans still blinded by their own fear and ignorance might attend the installation to berate him. He had suffered enough at American hands already. The video feed was two way, so Mohammed could see the audience. The most moving thing Laurie shared with us was that many of the attendees came forward and mouthed “I am sorry” to Mohammed’s projected image. For more on Mohammed el Gharani and Habeas Corpus see this link:
Laurie Anderson echoed Jaron Lanier’s thought on the necessity for kindness, empathy and beauty as hallmarks of our creative relationship with technology. Both pointed toward the potential for technology to help us connect, see, listen to and understand each other even if we do not agree.
Laurie and Lou Reed, her husband who died of cancer in 2013, came up with three rules to live by which she shared with us: 1. Do not be afraid of anyone. 2. Have a good bullshit detector, and learn how to use it. 3. Be tender with life. Afterwards, I could only remember 1 and 2. That is because I have issues with tenderness. Tender feelings make me feel vulnerable. Gotta work on that.
There is lots more to write about, so many encounters and experiences packed into 4 days, 40 venues and nearly 300 speakers/performers/presenters. Moogfest was so much more than I ever expected – my world expanded several times over. And the best way to top it all off was to play with my cohorts before an exclusive and appreciative audience. Here is an excerpt from Adrift in a Sea of Bells, one of the pieces we performed in the soundgarden following Moogfest:
My cohort Eleanor Mills introduced me to The Soundgarden at Central Park Elementary School several years ago. Eleanor goes there on a regular basis to “wake up the bells.” She has developed an intimate relationship with these bells, their interesting harmonics and how they all speak to and blend with each other. I have been privileged to play along with her on several occasions. Here is a short sample of Eleanor waking up the bells at a recent play date:
The Soundgarden was designed and constructed by Andrew Preiss in honor of Greg Taylor, a local musician and teacher at Central Park School who died in 2007. It is made of steel cylinder tanks (often referred to as bottles) cut to varying lengths to produce a variety of tones low to high. There are 8 large tanks and 12 tank tops positioned along M shaped bar (see photo). As you can hear from the clip, these rough cut steel tubular “bells” send out a sweet and sour soup of tones. Eleanor has discovered a variety of techniques in her playing that pull a rich and interesting sonic landscape from them.
These days our group prefers to pop up and perform soundscapes in interesting spaces with little notice. So the Soundgarden is a perfect spot for us (once I discovered there was electricity available. As an electronic musician, electricity is a necessity🔌). In order to produce a soundscape that would compliment the bells, I wanted to analyze their harmonic character. So I took my tuner down to the Soundgarden and hit each bell and held up the tuner. Well, the diverse harmonics that spring forth from the bells were just too much for the tuner – it was all over the place and seemed inaccurate to my ear. For example, the two tanks on the right in the photo above are clearly a minor third apart to the ear. Yet the tuner registered A# to F, which would be a fifth. This was a puzzlement.
I found a more accurate method of analysis by recording each bell individually and studying them on a spectrum analyzer. This approach was revealing and somewhat tedious. However, the rewards made it well worth the time spent scrutinizing the spectrum analyzer to pinpoint precise frequencies as they arose and decayed in the bell tone. I was able to track overtones up into the 5th and 6th octaves above the fundamental tone of each bell. Most of the overtones are enharmonic overtones (meaning the frequencies are not in a whole number integer relationship to the fundamental frequency of the bell), so they tend to be slightly more dissonant than consonant.
One interesting discovery was the presence of undertones in the bells. The two middle bells hanging on each side of the structure had tones that popped out underneath the perceived fundamental tone. The mystery of the heard minor third opposed to the measured perfect fifth was solved by this discovery. The fundamental tones of the two bells as seen on the spectrum analyzer and perceived by my ear are A# and C# – voila! the minor third. The bell that sounds a C# had an undertone of F, thus the tuner picked up the undertone. Interestingly, the center two bells on each side all had undertones and the tuner picked up on these undertones as confirmed by the spectrum analyzer.
So I had fun putting all the frequencies on charts to compare and contrast them. It was interesting to note how true (or not true) the bell overtones were to charted pitches. For example, a concert A is 440 hz but the bell tone frequencies that fell in the 400 block of A were closer to 432 hz (something to chew on for all the 432 hz tuning conspiracy theorists.) I charted all the over (and under) tones to see which tones were the most prominent. The most frequently appearing tone was a B, which is the tone of the natural world and deep space. The next most frequent were A,D,F and G. The least frequent tone was G#, but that one popped up alot in the tank tops.
In the final analysis, I used a pentatonic scale of BADFG for the soundscape called “Adrift in a Sea of Bells”- and it is a work in progress. Tonight we will play to a prerecorded track of the piece, but you will get a taste of it. My computer decided it was tired and started dropping audio as I was playing the soundcapes at our runthrough last Sunday. So we will not play “The Sound of Sirens” tonight because I really need to trigger and sculpt that piece with Ableton. We will perform that next time we play.
I believe the weather will turn in our favor, so please join us tonight at 7 pm for a Post-Moog sound offering. We will be at 724 Foster Street at the Sound Sculpture in front of the Central Park Elementary School. Bring your own chair and join us for an hour or so. Look forward to seeing you there!