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Old 10 March 2017, 20:20   #5
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 43
Posts: 20,647
Originally Posted by ross View Post
Hi Toni, I'm trying a not-DMA copper player with a fast sample rate.
Switching off all interpolations and using 4 ch mode should result in non-processed output.

But what about changing *volume* even with the copper?
Change should be instant but because volume in real hardware is PWM (volume value selects pulse width), results may not be exactly same if volume is continuously changed.

What's the formula that calculate sample value for the host?
sample * volume, then channel mixing (depends on selected channel mode) and interpolation, result is scaled (if not already) to 16 bit sample.
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