# Pre Compute FFT Analysis

**URL:** <https://forum.csound.com/t/pre-compute-fft-analysis/518>\
**Category:** General\
**Created:** [October 2, 2021, 2:25pm UTC](https://forum.csound.com/t/pre-compute-fft-analysis/518 "2021-10-02T14:25:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mmcdermott1](https://forum.csound.com/user_avatar/forum.csound.com/mmcdermott1/32/137_2.png) [@mmcdermott1](https://forum.csound.com/u/mmcdermott1)\
**Post date:** [October 2, 2021, 2:25pm UTC](https://forum.csound.com/t/pre-compute-fft-analysis/518/1 "2021-10-02T14:25:36Z")

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Hey again!

I am working on a program that requires several components performing phase vocoder processes simultaneously. I understand the csound opcodes are built to run in realtime, but I am using audio files as my input so I do not need pvsanal to run constantly.

To optimize the program, I would like to perform the analysis once, store the values and then stop pvsanal to free up computing power.

Is this possibly/any recommendations on how to go about this?

Best,  
Mitch

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<div class="post-metadata">

**Author:** ![mmcdermott1](https://forum.csound.com/user_avatar/forum.csound.com/mmcdermott1/32/137_2.png) [@mmcdermott1](https://forum.csound.com/u/mmcdermott1)\
**Post date:** [October 2, 2021, 2:48pm UTC](https://forum.csound.com/t/pre-compute-fft-analysis/518/2 "2021-10-02T14:48:19Z")

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SOLVED:

Using pvswrite to generate pvx files in advance – any other suggestions or methods would be helpful though!

Thanks! 🙂