if it's not a fake this is the most impressive PCM sound i've heard using the PSG

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By PingPong

Prophet (3885)

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08-01-2022, 15:15

By thegeps

Paladin (1020)

thegeps's picture

08-01-2022, 17:06

Well, it is 512 KB for 30 sec of recording. I think it is doable. I remember a program I've found on a magazine (in its cassette) when I was young... ehm, younger.
It was able to direct play or record sounds (and then replay them) from the datassette. And it was damned good (well at least in my memories, maybe I was too excited for it at that time)

By thegeps

Paladin (1020)

thegeps's picture

08-01-2022, 17:20

Anyway, in the video description there's a link that point us to a well known article on Grauw's MAP site. So no fake at all Wink

http://map.tni.nl/articles/psg_sample.php

By PingPong

Prophet (3885)

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08-01-2022, 18:07

the quality is the key factor. It is simply stunning.

By ARTRAG

Enlighted (6832)

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08-01-2022, 19:07

The technique is the one described by Grawu but that solution is limited by the unwanted volume transitions due to the fact the 3 channels cannot change at the same time. The solution here minimises the unwanted transitions by the search across all possible sequences of volume changes on the 3 channels.

By aoineko

Champion (408)

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08-01-2022, 21:10

The description says that the music uses a whole 4M ROM.
This is not really applicable for a game. Especially since the Z80 must be used at 100%.

The ARTAG's PCM Encoder algorithm is supposed to be of better quality.
By the way, I'm going to test it right now. Smile

By PingPong

Prophet (3885)

PingPong's picture

08-01-2022, 22:37

hi, i didn't check. Did not the solution already use the viterbi optimization?
if not it would be exceptional to test the same song with the PCM Encoder, maybe one could get even better quality!

By ARTRAG

Enlighted (6832)

ARTRAG's picture

08-01-2022, 23:08

it is the one using viterbi optimisation

By TotO

Rookie (24)

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19-01-2022, 01:45

Well... Reading the first post, I have expected to ear better.
The most impressive AY-PCM for me was that: https://www.youtube.com/watch?v=CPCyF71098o

By jltursan

Prophet (2619)

jltursan's picture

19-01-2022, 12:12

It's not a fair comparison, GX4000/CPC+ range have a DMA sound feature that allows to feed the PSG with near to zero CPU cycles wasted. An Atari ST can also get cool effects with the same PSG thanks to its powerful processor and architecture Smile

By ARTRAG

Enlighted (6832)

ARTRAG's picture

19-01-2022, 13:58

IIRC Atari ST has 4 programmable timers that can be used to trigger interrupts...

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