If the playback is choppy, try increasing the buffer size. Smaller values mean faster and smoother updating (1024 is the lowest possible) but also require a fast computer with a nifty web browser.

The piano is always updated as fast as possible when using the normal WebSid emulator, regardless of buffer size. However, larger buffer sizes may introduce flickering notes. Decrease the buffer size to avoid this.

The top right waveform legend explains the colors of notes on the keyboards. Red is pulse, green is triangle and blue is sawtooth. Gray is noise. Waveforms may be combined, but 31, 61 and 71 are only audible on the 8580 SID chip.

The numbers above the bars are hexadecimal. Pulse width has 12 bits and goes from 0 to 4095. The triangle indicates that it's most audible in the middle. The filter cutoff has 11 bits and thus goes from 0 to 2047.

The small yellow bar is the filter resonance. It can go from 0 to 15 (maximum resonance). Resonance is a peaking effect which emphasizes frequency components at the cutoff frequency of the filter, causing a sharper sound.

RM is ring modulation (non-harmonic overtones) and HS is hard synchronization (complex harmonic structures). Both effects require two voices – the previous voice as the carrier and the current voice as the modulator.

Sometimes the use of gate bit (i.e. when the piano key is depressed then later released) make notes too quick to sense, or it may in some cases even hide them. Turning it off with the toggle button in top can amend this.

Click the green buttons to toggle voices ON or OFF. You can also type 1, 2 and 3 or alternatively q, w and e. (You can also use 4 and r for digi if you are using legacy WebSid, but it is not reflected on this page.)

2SID and 3SID tunes are supported. Each keyboard will automatically combine to host an entire chip (i.e. 3 voices). The square voice buttons will toggle entire SID chips ON or OFF when playing these types of tunes.

If you want to "solo" a voice/chip, hold down Shift while pressing the hotkey.