Message-ID: <n1388498896.57644@korgrd.com>
Date: 6 Feb 1996 16:17:03 -0800
From: "Dan" <dan@korgrd.com>
Subject: M1 PCM Cards
To: "Wavestation List"
X-Mailer: Mail*Link SMTP/QM 3.0.0
Status: R

RE: M1 PCM Cards 4:14 PM 2/6/96

Hi all -

There have been a number of messages re using M1 PCM cards in the Wavestation, and I just found a message I wrote a couple of years ago on the same topic:

* * * * * * * * * * * *

The PCM playback chip used in the Wavestation and 01/W series treated PCM slightly different than its predecessor (used in the M1 and T-series). The interpolation technique requires 2 samples *after* the end of the loop, which the M1's PCM chip did not - so M1 cards don't have those extra samples.

When an M1 PCM card is inserted into the Wavestation or Wavestation A/D, the loops are adjusted forward by 2 samples. For some sounds, this will work; for others, it will not. It depends upon the particular sample data being played (specifically, how closely the two samples at the end of the loop match the two just before the loop start). Because of this, Korg does not officially recommend the use of M1 cards with the Wavestation and Wavestation A/D (if you have an M1 or T-series card lying around, though, you might try it out - as above, some samples on a given card will sound OK, some will not).

For hardware reasons, it was apparently impossible to provide a complete fix (I believe that the main CPU does not have access to the actual sample data, for instance, so it couldn't mock up an extra two samples....).