Thanks for that information Christian! My soundcard is running at 48000hz samplerate, so does this change how much of the sample is cached in RAM (I'd imagine that any 44100hz sample heads would be upsampled)? And one other question, if I also have 48000hz samplerate samples, this would change the number of sample points that would be preloaded and if so, to what?
Thanks again, Andrew. On Thu, Aug 12, 2010 at 7:49 AM, Christian Schoenebeck < schoeneb...@software-engineering.org> wrote: > On Thursday 12 August 2010 01:01:57 Andrew C wrote: > > Hey list, > > > > Any simple forumla/rough guide to calculating how many KB each sample > head > > will take up in RAM? > > That depends on the compile time parameter CONFIG_PRELOAD_SAMPLES, which by > default is 32768 sample points (which equals 743ms if the samples have a > rate > of 44.1kHz). You can change that value if you like. So for one mono sample > this would be > > 32768 (CONFIG_PRELOAD_SAMPLES) * 2 (16 bit sample) = 64kB > > for a stereo sample you have to double it, thus it would be 128kB per > stereo > sample. > > For the total RAM usage of one instrument you have to check which samples > are > referenced by the instrument (since the sampler will only buffer the > samples > which are actually used by the requested instrument and ignore all unused > samples) and multiply it with that value. And of course, if samples are > shared > among intruments, the respective samples will only be cached once. > > CU > Christian > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by > > Make an app they can't live without > Enter the BlackBerry Developer Challenge > http://p.sf.net/sfu/RIM-dev2dev > _______________________________________________ > Linuxsampler-devel mailing list > Linuxsampler-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linuxsampler-devel >
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