Testing sound of different MSX sound chips and their FPGA implementations

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By Pencioner

Paladin (931)

Pencioner's picture

26-07-2018, 18:31

Meits, thanks for explanation. Thus the proper way for uncoupling ground should be on the power circuit, not an audio one, right? In my case i connect isolator to the cartridge/computer output, before the mixer. Didn't try to put it between mixer and soundcard though, does it have a sense?

By Pencioner

Paladin (931)

Pencioner's picture

27-07-2018, 01:25

So, with a closer look - the distortion from the ground loop isolator was a subtle and much less than from MFR sound fix. Here's three recordings:
With ground loop isolator (one direction)
With ground loop isolator (other direction)
Without ground loop

I kept the recording levels the same, so you can hear that particular isolator mutes the signal a few db in one direction but almost don't mute in other direction

I didn't try to connect isolator after the mixer though, because i think it doesn't make a sense

By Pencioner

Paladin (931)

Pencioner's picture

24-11-2018, 20:09

So, here's a nice update of PSG testing. The new ones are:
*) Darky by Supersoniqs (in the PSG mirroring mode, no tunes composed specifically for it yet, keep tuned)
*) PSG FPGA which was delivered by great Eugeny for GR8NET in the latest firmware update

Both are of good sound qualilty, and got very low noise level. The GR8NET's PSG has sharp emulation (and it can be switched to the MFR port for compatinility, so you can have two PSG in system for playing beloved VGMs if you have GR8NET and/or MFR). And i should say, Darky is a fresh listening pleasure

PSG test update

By hamlet

Scribe (2467)

hamlet's picture

25-11-2018, 10:20

Ja, I like the GR8net PSG, it is a pleasure to listen the Goonies "R" good enough soundtrack with that device!
Thanks for doing this comparison, this may help a lot for MSXsound newbies like me!

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