Exploring the Commodore 64 MOS Technology 8580R5 Sound Interface Device
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
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