kunstmusik.comsteven yi :: music – thoughts and experiences

Skip to content steven yi :: music thoughts and experiences Menu Blog csound blue General Memories Music Contemplations Tai Chi Book Reviews Productivity Compositions Podcast Tai Chi Csound Programs About Me Donations Web Audio Conference 2019 I was very happy to attend and present at this year’s WebAudio Conference . The NTNU did an incredible job hosting and organizing the event and there was a great variety of research presented. I was noting to myself throughout the conference how it seems to get better each year for both the software and technology shown and the musical performances performed. I think it’s a sign of the level of maturity of the browser platform as a whole that it can support high-level musical work today. For those who might be interested, all of the sessions were recorded and streamed online. Archives are available here . For my own work, I presented on the Csound-WebIDE here: (Note: I misspoke about Chowning’s work and said “parallel carrier, single modulator” when I should have said “parallel modulator, single carrier”.) I also participated in the jam session by live coding with Csound here: Great to see old friends and meet new ones. I hope to make it to next year’s conference in Barcelona! Author Steven Posted on 2019.12.8 2019.12.8 Categories General Tags csound Leave a comment on Web Audio Conference 2019 Sound Design: Ring Mod with low-frequency modulations Audio example of Ring Modulation with low-frequency modulations Csound Code + MP3: ringmod_modulations.zip Download Experiments with complex ring modulation and low-frequency modulations for sound design. Each ring modulation generates sidebands for the previous signal and with four ring modulations up to 16 frequencies could be generated. Modulating with ring modulation leads to interesting, synthetic sounds due to the ratios of frequencies changing over time. Having multiple orders of ring modulations allowed for interesting patterns of spectrums to develop (see spectrogram). Spectrogram from Audacity (2048 bin size, 0-16000 Hz, linear) This example has two instruments, RM1 and RM2. RM1 uses exponential envelopes to start and end at harmonic ratios but has different rates of change due to different starting ratios. (Mentioned here as ratios since the outputs are being used to multiply the p4 base frequency.) RM2 is a variation on RM1 and uses a sawtooth LFO for one of the modulations. Both use a high-pass filter to remove frequencies generated below the base frequency. The score plays a pattern with RM1 twice, once with 0.5 durations and again with 0.25 durations. This sounded to me like they could be used as a simple laser sound in a game or as a component of more complex laser sound design. The score then has a 20 second long note for RM2 that gives it enough time to hear the evolving frequency patterns. Author Steven Posted on 2019.10.20 2019.10.20 Categories csound Tags csound , sound design Leave a comment on Sound Design: Ring Mod with low-frequency modulations Sound Design: FM with Modulations Audio Example of Complex FM sound with modulations to indices Csound Code + MP3: fm_with_modulations.zip Download Complex FM (4 operator, what Chowning and Bristow calls Parallel Carrier, Independent Modulator in “FM Theory and Applications”). The two operator stacks are using 4:2 and 1:1 C:M ratios. expseg envelopes are used to modulate the overall shape of indices and unipolar square lfo’s are used for an additional layer of modulation. I thought the 12 and 3 Hertz for the lfo’s gave some nice texture between the two layers. I think it probably works best in the low end to middle of the frequency range. The result using pch of 5.00 reminded me of things heard in some progressive house tracks. Author Steven Posted on 2019.10.13 2019.10.13 Categories csound Tags csound , sound design Leave a comment on Sound Design: FM with Modulations randcubic glissandi: random line with cubic interpolation Audio example of randcubic used for glissandi randcubic_glissandi.zip Download Custom Csound user-defined opcode randcubic to generate cubic interpolated lines. Example above uses randcubic for achieving time-varying glissandi with multiple voices. Based on code from http://paulbourke.net/miscellaneous/interpolation/ . Code for UDO is as follows: opcode randcubic, a,kk kamp, kfreq xin ky0 init random:i(-1, 1) ky1 init random:i(-1, 1) ky2 init random:i(-1, 1) ky3 init random:i(-1, 1) kcount init 0 asig init 0 kperiod = sr / kfreq kndx = 0 while (kndx < ksmps) do ka0 = ky3 - ky2 - ky0 + ky1 ka1 = ky0 - ky1 - ka0 ka2 = ky2 - ky0 ka3 = ky1 kmu = kcount / kperiod kmu2 = kmu * kmu asig[kndx] = ka0 * kmu * kmu2 + ka1 * kmu2 + ka2 * kmu + ka3 kcount += 1 if(kcount > kperiod) then ky0 = ky1 ky1 = ky2 ky2 = ky3 ky3 = random:k(-1, 1) kcount -= kperiod endif kndx += 1 od asig *= kamp xout asig endop Author Steven Posted on 2019.9.23 2019.9.27 Categories csound Tags csound Leave a comment on randcubic glissandi: random line with cubic interpolation Live Code: 2019-09-18 Live code music session using hex beats, event-rate oscillators, bitshifts, and modulus operations. Author Steven Posted on 2019.9.22 2019.9.22 Format Video Categories csound , General Tags csound , live code Leave a comment on Live Code: 2019-09-18 Live Code: 2019-08-14 Live code session using left-shift patterns and double modulus constraints. (First time using OBS on a new Mac, video is slightly behind the audio…) Author Steven Posted on 2019.8.25 2019.8.25 Categories csound , General Tags csound , live code Leave a comment on Live Code: 2019-08-14 Life is Beautiful https://t.co/6oeRuGJxan by @kunstmusik – “Life is Beautiful” pic.twitter.com/BfpfZuDUig — hydra patterns (@hydra_patterns) July 24, 2019 Working with Hydra this past week has been quite a joy. This visual has been one of my favorites so far, a slowly evolving pattern that grows and grows in richness and complexity. So alive and so beautiful. Author Steven Posted on 2019.7.23 2019.7.23 Categories Visual Leave a comment on Life is Beautiful Live Code: Bitshift Rhythms 2019-07-22 Live coding session using bitshift patterns for rhythms and melodic contours. Author Steven Posted on 2019.7.22 2019.7.22 Format Video Categories csound , General Leave a comment on Live Code: Bitshift Rhythms 2019-07-22 Excursions with Hydra https://t.co/a2Y3gh23OD by @kunstmusik pic.twitter.com/6u1eDR4GSf — hydra patterns (@hydra_patterns) July 17, 2019 I’ve been practicing visuals with Olivia Jack ‘s wonderful system Hydra the past couple of days and I have been enjoying it very, very much. It’s been a blast to have a higher-level abstraction layer to work with over coding GLSL shaders directly. I suppose a big factor in my joy is that I tend to spend a lot more time with JS than I do GLSL too. ...