Open source high-quality pro audio sample rate converter library released from Voxengo

DSP, Plug-in and Host development discussion.
quikquak
KVRian
534 posts since 6 Aug, 2005 from England

Post Thu Oct 25, 2018 1:23 am

I was going for a fixed internal scaling rate (88k or something) for consistency in modelling but I think I’m going to scrap this, and just go for 2X oversampling which can be turned off if anyone uses ~+64k sampling rate, or something like that. Thanks anyway, this is a very cool bit of software.
Dave H.

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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Fri Dec 14, 2018 2:36 am

Released v1.7 with the following changes:
* Improved sample timing precision.
* Increased CDSPResampler :: ConvCountMax to 28 to support a lot wider resampling ratios.
* Added bench tools.
* Removed getInLenBeforeOutStart() due to incorrect calculation.

Had to remove getInLenBeforeOutStart() because it was calculated incorrectly, and after some analysis I've concluded it's really hard to calculate it correctly without doing CPU-expensive modeling - too much non-linearity.
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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Mon Jan 07, 2019 6:00 am

Quite a nice New Year finding - r8brain-free-src mentioned in Credits of Red Dead Redemption 2, one of the biggest games of 2018: https://www.rockstargames.com/reddeadre ... n2/credits
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audiojunkie
KVRAF
2810 posts since 19 Apr, 2002 from Utah

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Thu Jan 10, 2019 5:08 pm

Aleksey Vaneev wrote:
Mon Jan 07, 2019 6:00 am
Quite a nice New Year finding - r8brain-free-src mentioned in Credits of Red Dead Redemption 2, one of the biggest games of 2018: https://www.rockstargames.com/reddeadre ... n2/credits
Nice! Congratulations!!
C/R, dongles & other intrusive copy protection equals less-control & more-hassle for consumers. Company gone-can’t authorize. Limit to # of auths. Instability-ie PACE. Forced internet auths. THE HONEST ARE HASSLED, NOT THE PIRATES.

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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Sat Jan 12, 2019 7:00 am

audiojunkie wrote:
Thu Jan 10, 2019 5:08 pm
Aleksey Vaneev wrote:
Mon Jan 07, 2019 6:00 am
Quite a nice New Year finding - r8brain-free-src mentioned in Credits of Red Dead Redemption 2, one of the biggest games of 2018: https://www.rockstargames.com/reddeadre ... n2/credits
Nice! Congratulations!!
Thanks! I've finally found some time and desire to further better r8brain-free-src. While its sound/conversion quality is top notch, it still lags a bit in speed compared to at least one competing SRC.
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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Thu Feb 28, 2019 10:57 pm

Version 1.9 was released recently, it is faster now for some sample rate conversions, esp. on downsampling. Still some optimizations can be done for upsampling.
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audiojunkie
KVRAF
2810 posts since 19 Apr, 2002 from Utah

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Fri Mar 01, 2019 11:05 am

Thank you! I love and appreciate the hard work you do!!
C/R, dongles & other intrusive copy protection equals less-control & more-hassle for consumers. Company gone-can’t authorize. Limit to # of auths. Instability-ie PACE. Forced internet auths. THE HONEST ARE HASSLED, NOT THE PIRATES.

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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Thu May 02, 2019 10:54 am

Released v2.0 which now includes a fast power-of-2 upsampling, it's blazing fast now.
https://github.com/avaneev/r8brain-free-src

Still have one optimization in plans, for faster upsampling to non-power-of-2 factors, when there is space available to split upsampling into non-power-of-2 and power-of-2 steps.
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audiojunkie
KVRAF
2810 posts since 19 Apr, 2002 from Utah

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Mon May 06, 2019 7:46 pm

Excellent!! Thank you!!
C/R, dongles & other intrusive copy protection equals less-control & more-hassle for consumers. Company gone-can’t authorize. Limit to # of auths. Instability-ie PACE. Forced internet auths. THE HONEST ARE HASSLED, NOT THE PIRATES.

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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Wed May 22, 2019 5:51 am

Released v3.0 with a large number of improvements: it's now is probably one of the fastest high-quality sample rate converters available.
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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Wed May 29, 2019 6:46 am

Released v3.7 today - now it is possible to use PFFFT which is as fast as Intel IPP FFT, only conversion quality is limited to 24-bit resampling.
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Aleksey Vaneev
KVRAF
3559 posts since 7 Sep, 2002

Re: Open source high-quality pro audio sample rate converter library released from Voxengo

Post Fri May 31, 2019 1:47 am

Updated to v4.0, removed templated parameters, now I'm happy. ;-)
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