[LAU] Long latencies with JConvolver or BruteFIR

[Moshe Werner]

Hi there,

Could you post the jconvolver config file, I think that the latency depends
on the number of partitions.

Cheers
Moshe

On Sat, Oct 5, 2019, 19:45 AKC360 <alexkc1 at hotmail.com> wrote:

> Hello People,
>
> I have a strange problem with high latency for both JConvolver or BruteFIR.
> My Jack settings are low(3ms) and stable and the latency doesn't seem to
> tally with the partition size?
>
> My Hardware:
> i5-8259U - Intel NUC
> 8GB DDR4
> PCIe SSD
> M-Audio - MTrack8 USB Sound
>
> Software:
> Ubuntu Studio 19.04 - Have tried updated and fresh install also a blank
> Debian 10.1
> Jconvolver 0.9.3-2
> BruteFIR 1.0o-1
> Jackd2 1.9.12
>
> Settings:
> Jack Settings - 48KHz 64Buffer 3Period
> BruteFIR - 7 Filters each 8192 Taps, These are each split into 512sample
> partitions
> Jconvolver - 7 Filters each 8192 Taps, These are split into 64sample
> partitions
>
>
> Results:
>
> JConvolver Latency = 85mS, CPU Load = <5%
> Brutefir Latency = 104mS, CPU Load = 55-60%
>
> These latencies are measured inside Jack(Not using sound card IO) using a
> jack signal generator and a jack oscilloscope. But also verified
> externally.
>
>
> I dont understand why I am getting such long latencies, I would be very
> grateful if anyone could shed some light on why the latencies are so long
> and even more grateful if you could share how to fix it!
>
> Thank you in advance,
>
> Alex
>
>
>
> --
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