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Old 01 July 2013, 15:08   #1
pandy71
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Join Date: Jun 2010
Location: PL
Posts: 1,532
High Quality reproduction of Audio on 8 bit.

Hi All,

From some time i was curious about HQ audio reproduction on 8 bit PCM (Paula).

Bellow there are 4 files (8svx format) with results of my experiments.

1 classic recording and 1 modern, each of them with two versions, one for OCS ( sample rate 29073Hz, audio period 122 - $7A) and second for ECS and AGA with higher horizontal frequency active (sample rate 45473Hz, audio period 78 - $4E).

To be honest - i'm quite interested about your subjective opinion as i have no (yet) opportunity to listen those samples on real Amiga.

OCS should be capable to provide some 10 - 12 bit dynamics, where ECS+ over 16 bit dynamic on 8 bit DMA channel without channel folding (combining).

Sorry for file size (4.7MB for OCS and 7.4MB for ECS+) - this will not fit on FDD and external storage is required.

http://www.filesplat.com/~shared-download?id=0HSLTQI50F06C3T39IIV78EUH8255I92
http://www.filesplat.com/~shared-download?id=1XJO8CAYIZ2EITX77SU8G89VYS9OPWL8
http://www.filesplat.com/~shared-download?id=VEMIH23RPDF48JC8P0MHYFNHLAEMZAFH
http://www.filesplat.com/~shared-download?id=2MZHNYSZA3BH22IEY7P25YN4HNZUK9IR

Regards and enjoy Paula audio!

--spectrograms added--

ECS and AGA - dynamics over 96dBFS (i.e. 16 bit or higher)



OCS - dynamics over 80dBFS (i.e. 12 bit or higher)


Last edited by pandy71; 03 July 2013 at 14:02.
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