EXS 24 Logic Sampler Users Group

> I asked:
>>
>> But how can it guess what note is going to play next? I seriously 
>> doubt
>> there is any kind of look ahead function in Logic, EXS or Kontakt, and
>> AFAIU without such a function the overall difference would be minimal.
>> Am I missing something here?

On Tuesday, August 26, 2003, at 03:38  AM, Murray McDowall explained:
>
>
> As I'm sure you understand, the audio data for your samples is stored 
> on the
> media on linear tracks. The caching is controlled not by the 
> application
> (EXS24) but by the drive firmware --that is software stored on ROM on 
> the drive
> -- it is the program that runs on the drive's internal microprocessor--
> including the cache controller. The caching controller's strategy 
> might be to
> read the whole track into cache rather than just the bit that is 
> currently
> being requested. If you need the data in subsequent sectors on that 
> track a
> short time later they might still be in the cache.
>
> In my long piano notes example (holding down a chord with the sutain 
> pedal so
> that you have to read a bunch of 30+  sec long piano samples off your 
> sample
> drive) without caching,  the read head would chase around the media 
> reading a
> succession of small segments of those long notes. The result might 
> mean that
> the heads return many times to the same file to read its data to 
> produce one
> continuous tone. If caching is employed some or even all of the 
> subsequent
> returns to that note might be avoided -- the whole note might have 
> been read
> into cache on the first partial access. In that case all subsequent 
> requests
> for that note's data will be relayed to the EXS24 direct from the 
> cache.
> Perhaps 8MB is too small to really make a big difference here -- 128 
> MB might
> really accelerate this sort of application dramatically.

OK, now I see. Mucho thanks, Murray.

Best,

Andy
>