rga24

0:00 Preamble 2:30 Triangle wave - curved due to non-linearity in 6581 amplifiers 3:45 Sawtooth wave - kink at zero crossing 3:57 Pulse wave with pulse width control 4:05 Two oscillators - pulse wave 4:35 Filter - low pass, pulse wave 5:09 Non-linearity (distortion) in 6581 filter 6:52 Filter - band pass 6:59 6581 filter cutoff characteristics 8:18 Filter - high pass 9:20 Filter - low pass + band pass 9:44 Filter - notch (low pass + high pass) 10:58 Filter - band pass + high pass 11:48 Filter - resonance 12:26 Filter - second harmonic distortion 13:43 Filter - two oscillators 15:54 Filter - three oscillators 17:41 Filter - high distortion 19:30 Waveforms - combined waveforms 19:58 Waveforms - combined waveform (triangle and sawtooth) 20:21 Waveforms - combined waveform (triangle and pulse) 22:35 Waveforms - combined waveform (sawtooth and pulse) 23:56 Waveforms - combined waveforms, pulse width control 25:01 Waveforms - combined waveform (triangle and sawtooth and pulse) 25:12 Waveforms - ring modulation (triangle * square) 25:17 Waveforms - ring modulation and sync 25:22 Waveforms - triangle sync 25:27 Waveforms - sawtooth sync 25:36 Waveforms - combined waveform ring modulation (triangle and pulse, square) 26:32 Waveforms - combined waveform (sawtooth and pulse) sync Exploring the Commodore MOS Technology 6581 Sound Interface Device (SID) using a Behringer BCR2000 control surface. Please see my other video on the 8580R5 as well as this one. Filming by 3DMtunes: The PC contains a HardSID card which is controlled by a custom piece of software. The Yamaha V50 keyboard is plugged into the PC using MIDI and sends MIDI note on and note off messages. The Behringer BCR2000 control surface is also plugged into the PC using MIDI and sends MIDI controller change (CC) messages. The custom software receives both types of messages and writes SID chip register changes to the HardSID card. The functions on the BCR2000 knobs and buttons are as follows: Top row (from left to right) Filter cutoff frequency Filter resonance Filter mode Volume Buttons (top row from left to right) Filter oscillator 1 on/off Filter oscillator 2 on/off Filter oscillator 3 on/off Buttons (second row from left to right) Oscillator 1 on/off Oscillator 2 on/off Oscillator 3 on/off Second row (Oscillator 1 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release Third row (Oscillator 2 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release Fourth row (Oscillator 3 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release

Exploring the Commodore MOS Technology 8580R5 Sound Interface Device (SID) using a Behringer BCR2000 control surface. Please see my video on the 6581 as well as this one. Filming by 3DMtunes: The PC contains a HardSID card which is controlled by a custom piece of software. The Yamaha V50 keyboard is plugged into the PC using MIDI and sends MIDI note on and note off messages. The Behringer BCR2000 control surface is also plugged into the PC using MIDI and sends MIDI controller change (CC) messages. The custom software receives both types of messages and writes SID chip register changes to the HardSID card. 0:00 Preamble 2:55 Hardware features implemented (see below) 4:25 Three triangle waves 4:54 One oscillator, triangle wave, coarse and fine tune controls 5:25 Waveforms - triangle, sawtooth, pulse with pulse width control 5:47 Waveforms - noise 6:30 Waveforms - combined waveform (triangle and sawtooth) 7:42 Waveforms - combined waveform (triangle and pulse) 9:27 Waveforms - combined waveform (sawtooth and pulse) 10:14 Waveforms - combined waveform (triangle and sawtooth and pulse) 10:54 Waveforms - ring modulation (triangle * square) 12:02 Waveforms - ring modulation and sync 12:20 Waveforms - triangle sync 12:56 Waveforms - sawtooth sync 13:48 Waveforms - pulse sync 14:32 Waveforms - ring modulation and sync (continued) 15:45 Waveforms - combined waveform (triangle and sawtooth) sync 16:44 Waveforms - combined waveform ring modulation (triangle and pulse, square) 19:09 Waveforms - combined waveform ring modulation (triangle and pulse, square) and sync 20:27 Waveforms - combined waveform (triangle and pulse) sync 21:18 Waveforms - combined waveform (sawtooth and pulse) sync 21:54 Waveforms - combined waveform (triangle and sawtooth and pulse) sync 22:23 Envelope generators - sustain 23:21 Envelope generators - decay 24:31 Envelope generators - attack 25:32 Envelope generators - release 26:07 Two oscillators - sawtooth waves 27:07 Two oscillators - intervals, linear detune 27:53 Two oscillators - square waves, triangle waves 28:14 Two oscillators - combined waveforms 29:17 Three oscillators 30:28 Three oscillators - sawtooth waves 31:33 Filter - low pass 32:05 Filter - SID versions 32:42 Filter - 8580R5 filter cutoff resolution 36:00 Filter - three oscillators 36:06 Filter - clipping 38:28 Filter - band pass 39:46 Filter - high pass 40:47 Filter - low pass + band pass 43:42 Filter - notch (low pass + high pass) 44:58 Filter - band pass + high pass The functions on the BCR2000 knobs and buttons are as follows: Top row (from left to right) Filter cutoff frequency Filter resonance Filter mode Volume Buttons (top row from left to right) Filter oscillator 1 on/off Filter oscillator 2 on/off Filter oscillator 3 on/off Buttons (second row from left to right) Oscillator 1 on/off Oscillator 2 on/off Oscillator 3 on/off Second row (Oscillator 1 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release Third row (Oscillator 2 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release Fourth row (Oscillator 3 from left to right) Coarse tune Fine tune Waveform Pulse width Attack Decay Sustain Release