What DSP settings do you use?

Jan 10, 2009 at 7:49am

What DSP settings do you use?

In the DSP Status window, there are settings for:

* I/O Vector Size
* Signal Vector Size
* Sampling Rate

My card supports 96kHz sampling. What would appropriate values for the vectors be? Should I max out both at 2048?

#41621
Jan 10, 2009 at 6:11pm

In Max Help, read the MSP Audio I/O chapter.
The greater the vertor size, the less responsive your system.
The answer to your question depends on what kind of music you produce. If
you need interaction with live performers with acute synchronization, lower
your vector sizes. If you are producing sound using a pfft~ with FFT size
2024, having a 256 vector size won’t make much difference.
Same with 44.1 kHz or 96kHz. When you are producing in a studio, you may
hear a wide difference. When you are playing a gig where the lightning
system makes more noise than the guys drinking in the back of the hall, 96
may not be less necessary.
J-F.

>
> In the DSP Status window, there are settings for:
>
> * I/O Vector Size
> * Signal Vector Size
> * Sampling Rate
>
> My card supports 96kHz sampling. What would appropriate values for the vectors
> be? Should I max out both at 2048?

#148310
Jan 10, 2009 at 7:19pm

just to add: vector sizes of 64 and below(for both i/o and signal) are best for tasks which depend on scheduler accuracy where scheduler is in audio-interrupt. however, if you intend to use larger vector sizes for FFT functions or any other reason, you can also set the larger size in the DSP Settings… and then use a smaller vector size(64 or 32) within a poly~ if you need various options at the same time. I also leave scheduler in overdrive and audio interrupt modes. Audio Interrupt sets the scheduler to poll once every signal vector. Overdrive causes Max to give priority to MIDI and timing over GUI-interaction/drawing. (searching for “dsp status” within the help documentation for Max5 shows even more detailed info.)

#148311

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