What determines memory overflow?

[Sugizo]

Hi folks,

I encountered the following situation when loading relatively large samples onto my Korg (Tr61 with 64 MB in this case):

- Loaded 14 MB kfs sample no probs

- Could not load 25 MB kfs sample (I at this stage thought it was a memory capacity issue and I had surpassed the limit, although I initially believed 64MB of RAM meant you could load up to 64MB of sample)

- therefore halved the bitrate of the not-loading sample to give me a 12 MB kfs, however this did not load either.

Therefore my question is: what factors determine whether a kfs sample will overflow your memory or not?

Cheers you experts!

[X-Trade]

I'm not certain, but I'm pretty sure that no matter what format you save your samples in as files, they are stored in the same format sample/bit rate in RAM for faster access (not having to up/downsample in realtime to get to the same as the system rate).

[Sugizo]

I see. I've done some quick and simple experimenting and established some limits as to which files derived from mp3s I can or can't load onto the triton.

If anyone is able to load kfs derived from

mp3 128 bitrate 3.5 MB or over
mp3 192 bitrate 5.7 MB or over or
mp3 320 bitrate 9.5 MB or over

directly or indirectly by saving this mp3/audio data as some other waveform first could you drop me a line. I'm not familiar at all with this sort of stuff so don't laugh me out of court if I'm talking crap!

Ta

[Synastikki]

I think in this case it might not be about the size of the stuff more than it is the length...
From triton classic's manual:
The TRITON comes with 16 Mbytes of sample memory
(waveform memory). This allows approximately 2 minutes
and 54 seconds of monaural sampling, or approximately 1
minute and 27 seconds of stereo sampling. By installing one
or two 72-pin SIMM boards you can expand the memory to
a maximum of 64 Mbytes (two 32 Mbyte SIMM boards). In
this case, you will be able to record up to four monaural
samples that are each 2 minutes and 54 seconds long, for a
total of 11 minutes 39 seconds (or four stereo samples that
are each approximately 1 minute and 27 seconds long, for a
total of 5 minutes 49 seconds)

From this we can assume that the triton cannot take any samples that are longer than 2:54/sample for mono samples and 1:27/sample for stereo samples... this means that you cannot load a sample that is made from a song that is longer than 2:54 and even in this case it has to be in mono. Bitrate of the MP3 in this case has nothing to do with it because the sample is defferent kind of sound-data than the mp3 and the mp3 bitrate is just to tell us what kind of quality the MP3 actyally is.

[Sugizo]

kiitos Synastikki,

Length does seem to be the determining factor, however I have loaded a wide range of files and have established different limits to those you mentioned were out of the manual. For instance, I can load any stereo sample which is exactly 3:10 or shorter, whereas any sample above this length leads to memory overflow.

As to the 64MB issue, it seems I wasn't entirely mislead. I can load any amount of samples up to a total of 64 MB as long as none of the individual samples are the length referred to above.

Anyhow, cheers folks, I guess that's my main doubt answered!

[Synastikki]

I think it is because of that you have a TR and that is from Triton Classic manual