playing samples on msx

By norakomi

Paragon (1140)

05-09-2005, 11:52

there are some programs that play samples on an msx,
like sampbox (and factrack)......

Howover, when using these programs and playing a sample,
I simply hear nothing....

Only for Turbo-r???

By Bart

Paragon (1422)

05-09-2005, 11:58

Dunno exactly what you're trying to do, but SampBox only works with a Philips Music Module.

By norakomi

Paragon (1140)

05-09-2005, 11:59

aha,
ok, that makes sense,,,,

I just wanted to try to use a sample made on a pc (simple audio recording, 8 bit) on a msx.

By ARTRAG

Enlighted (6935)

05-09-2005, 12:02

the problem is very nice,
have a look here before asking for more

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

By BiFi

Enlighted (4348)

05-09-2005, 12:05

These programs are written for MSX-AUDIO with sample RAM. There are also some programs supporting Covox (which is called SIMPL on MSX) which is connected to the printer port.

Also there are programs which support playing samples on PSG and MSX-MUSIC...

By ARTRAG

Enlighted (6935)

05-09-2005, 18:20

@norakomi
with respect to http://map.tni.nl/articles/psg_sample.php,
should you have good math and programming skills and time and patience, I could
try to show you an algorithm (Viterbi’s one) and a solution for having optimal
multi-channel play on MSX. The resolution could be much higher than 8KHz at 8bit.
I have no time and patience to do it by myself, moreover my solution needs a PC
to process the wave files, and I have left PC programming 10 years ago

By NYYRIKKI

Enlighted (6067)

05-09-2005, 18:25

Maybe this is close, what you want:

http://www.venus.dti.ne.jp/~takuya-f/msx/pcm120d2.htm

By ARTRAG

Enlighted (6935)

05-09-2005, 18:27

Sorry, I can read only English Italian or French
In any case I mean wave files on a poor PSG,
your program works on a TurboR

By NYYRIKKI

Enlighted (6067)

05-09-2005, 19:27

For PSG I don't think there are (at least very good) ready sample players. You need to compile your self one from sources mentioned before.

IIRC that PCMPLAY can use at least PSG, MSX-Audio or MSX tR internal PCM to play samples. Good thing is also, that it can be signed or unsigned PCM data with any type of fileheader. As a minus point at least some version had a nasty feature, that it ejected inserted ZIP-disks from drives and stopped harddisks before it started to play.

By norakomi

Paragon (1140)

05-09-2005, 19:51

ill check the files out !!

By ARTRAG

Enlighted (6935)

05-09-2005, 20:23

@NYYRIKKI
I know there is no good player for PSG!!
But....Trust me, HiFi quality with PSG is possible!!

The problem is complex to implement but has a straightforward “classical” solution.
“classical” for TLC engineers I mean.

I need to optimise a cost function that has 4096 states per step and three steps per sample.

It can be done with Viterbi algorithm, the result is that you can gracefully get high quality oversampled signals (up to X 3 with respect the original input) still having 8 bit PCM accuracy.