Posted By
gerliczer
on 2018-03-26
05:29:29
|  Re: 4 bit samples
The TED volume control defines 9 levels, including off. Setting the TED into D/A mode and turning on one or two channels resulting in multiplying the volume by one or two will give the less than 4 bit resolution.
Set one channel to ultrasonic output (register value $3FD) and lock the other (register value $3FE) and write the $FF11 register to produce levels. This results in 4+ bits resolution. There's a detailed description about this in one of TLC's messages sent to a mailing list ages ago.
Nowadays, C64 has a so called "waveform digi" method. You can play 8 bit digis with that, and there are examples of playback sample rates exceeding 15kHz.
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