PCE PCM

[elmer]

Volume (channel, pan, global) for all channels is log, but waveform data is linear. The 10bit waveform data for paired channels for 10bit is linear as well; the second channel volume is set to be 1/32 that of channel 1, so it all lines up. You can do 12 or 13bit with three channels I believe, but it's not really worth it.

Thanks! 

That's cool ... so just subtract 10 from the channel volume (for 1/32 with a 1.5bdB step), and then do some bit-shifting.

That doesn't sound too nasty. 

I just ordered an Owon SDS1702 scope, so I can retest test stuff if you need. Probably gonna pickup a 100mhz 16 channel logic analyzer soon too.

Fun toys! Are you planning to do some hardware design work in the future to justify those? 

I'm still hoping for a full SuperGrafx/SuperCDROM/ACD with HDMI in an FPGA, one day!

[ccovell]

I'm still hoping for a full SuperGrafx/SuperCDROM/ACD with HDMI in an FPGA, one day!

Kentaro has just resumed working on his FPGA PCE, after a 10-year hiatus.  https://twitter.com/KiC6280

[edit: fixed his name]

[Arkhan]

I'm still hoping for a full SuperGrafx/SuperCDROM/ACD with HDMI in an FPGA, one day!

Kenshiro has just resumed working on his FPGA PCE, after a 10-year hiatus.  https://twitter.com/KiC6280

You ever read something online and get erect nipples?

That's what this post did.

[Bonknuts]

Volume (channel, pan, global) for all channels is log, but waveform data is linear. The 10bit waveform data for paired channels for 10bit is linear as well; the second channel volume is set to be 1/32 that of channel 1, so it all lines up. You can do 12 or 13bit with three channels I believe, but it's not really worth it.

Thanks! 

That's cool ... so just subtract 10 from the channel volume (for 1/32 with a 1.5bdB step), and then do some bit-shifting.

That doesn't sound too nasty. 

I just ordered an Owon SDS1702 scope, so I can retest test stuff if you need. Probably gonna pickup a 100mhz 16 channel logic analyzer soon too.

Fun toys! Are you planning to do some hardware design work in the future to justify those? 

I'm still hoping for a full SuperGrafx/SuperCDROM/ACD with HDMI in an FPGA, one day!

 Nah, can't really justify the cost of it (but it wasn't too bad). Just some things I wanted to test out on the PCE, for clarity. Plus, I plan to do some micro controller stuffs in the near-ish future.