Current state of the audio options?

[Elektron72]

According to the current documentation, the VERA does contain a PCM playback system.

[StinkerB06]

On 9/19/2020 at 12:50 PM, Elektron72 said:

According to the current documentation, the VERA does contain a PCM playback system.

Except it's buffered. There would be a pause in the audio at AFLOW intervals, as the CPU spends its time computing the new samples to be written to the buffer. There's no DAC mode for that matter.

[SlithyMatt]

2 hours ago, StinkerB06 said:

Except it's buffered. There would be a pause in the audio at AFLOW intervals, as the CPU spends its time computing the new samples to be written to the buffer. There's no DAC mode for that matter.

The AFLOW interrupt happens when the buffer gets down to 25%, so you can play continuously as long as you have the PCM data in memory to feed the buffer. Playing back a long file from "disk" may be difficult, but if it was stored in small enough segments, you could keep on feeding the PCM indefinitely.

[Matej]

I love to see: YM2151 + SAA1099 + VERA PSG + VERA PCM in final design.

32Channel -

I do music tracking music. So music using 32 channels can be easily composed. When You use 2 channels for reverb, echo like effects using volume fx. Also You dont need put more instruments in one channel like on SID. You use one instrument per channel.

SAA1099 + VERA PSG

Its good to have 2 PSG chips. When You study Arcade Machines soundsystem You will see that 1x PSG is used for music together with FM. FM instruments and PSG drums, percussions and raw bassline. And second PSG for sound effects! So its ideal to have both! Also SAA1099p cost like 2USD thats good price for 6channels in stereo.

Rare MGT SAMCoupe homecomputer had SAA1099p here is little music demo:

And MODs on 6502cpu??? Well we play MODs like modules on COVOX on Atari 800 with 1,79MHz and 64kb ram. Even on POKEY modules with 4bit samples :). 

 

[CBMFan66]

With (currently) having three mixed sound sources, is there a mixer setting, or are they just added on top of each other (or averaged) ?

Also, it may come in handy, that if you do more than one sound source, or especially when you only do ONE sound source (like the Vera), to add a sound-in plug and mixer, so that the expansion slots can be used for sound boards (like a dual-SID expansion board using the ARM-SID) hat can either internally with a cable to a header, or externally be mixed into the sound output. It saves an external mixer panel ? and allows for a SID Player ROM on the cartridge.

And going a little off-topic (sound) here...

A graphics board design with (with HDMI for example) using dual-access RAM for direct pixel access and more memory/resolution/etc (like AMIGA retarget-able graphics) would obviously be connected separately anyway, but another nice option if you include BASIC ROM extensions to support or replace the original graphics capabilities in the provided BASIC.

Is it even feasable to provide ROMs for the 65C02 on the slots (like an address line to trigger its visibility when changing the banks) ?

[xanthrou]

Since there are only YM2151, DAC and VERA PSG left, is there still any chance of the FM chip getting scrapped when X16 was finalized?

[StinkerB06]

3 hours ago, xanthrou said:

Since there are only YM2151, DAC and VERA PSG left

The VERA PCM isn't a DAC

[StephenHorn]

5 hours ago, xanthrou said:

Since there are only YM2151, DAC and VERA PSG left, is there still any chance of the FM chip getting scrapped when X16 was finalized?

No.


 

[xanthrou]

14 hours ago, StinkerB06 said:

The VERA PCM isn't a DAC

Was talking about YM3012.

[BruceMcF]

5 hours ago, xanthrou said:

Was talking about YM3012.

Then you were undercounting, there are YM2151, DAC, VERA PCM & VERA PSG left.