Hi everyone, We are working on a game. Our aim is to access in real-time buffer by buffer the samples incoming from a microphone capture. We leveraged the custom DSP example from the API and attached the DSP to a channel group that receives input samples coming from the microphone in-buffer. Here i…

The echo is because you are copying the inbuffer into the outbuffer, and because of the latency you have created a delay line and thus an echo. Commenting out this line should prevent that: Marshal.Copy(obj.mDataBuffer, 0, outbuffer, lengthElements); The latency I am less sure of, I see you haven’…

Hi Jeff, Thank you for the reply…this is very helpful! Will need to delve deeper into the code to better understand what it’s doing. But we’re already confused by the fact that you comment out the Marshall.Copy in the DSLCallback and copy the samples from the sound instead in FixedUpdate. Is the DS…

The DSP callback is being used to fill the mDataBuffer- not sure why I left that part in FixedUpdate, must have been experimenting with the crackling noise and forgot to remove it. I commented out that line because that was causing echo for me, are you still getting echo when commenting that line b…

Hi Jeff, Thank you for the reply and clarification. It is working fine for me after commenting that line back in, no echo or crackling. Regarding the extra channels, were there also 6 channels on your end? All the best, kwe

I’m only getting 1 in and 1 out channel in the callback. If I plug in a duel input interface then I get 2 ins and 2 outs. Do you have an external interface plugged or something like that?

Hi Jeff, Sorry for the late reply. I don’t have an external interface plugged in. But that is a minor issue at this point as we can always skip the empty samples. After several attempts, I’m still not sure I fully understand the FixedUpdate method, so not sure how to modify it in order to record t…

[image] akwerius: I keep reading about an output_mp3 example on the forum but have yet to find it anywhere The output_mp3 script should be in “C:\Program Files (x86)\FMOD SoundSystem\FMOD Studio API Windows 2.02.06\api\core\examples\plugins”. [image] akwerius: Is the sound from createSou…

Apologies for resurrecting an old thread. But this is confusing: [image] jeff_fmod: The echo is because you are copying the inbuffer into the outbuffer, and because of the latency you have created a delay line and thus an echo. Commenting out this line should prevent that: Can you explain? …

[image] rich.ireland: Is not the purpose of the callback to return valid data in the outbuffer? That is the purpose of this callback, I am not sure why I suggested otherwise, and I am finding that the script I posted does indeed require the copy in the DSP_READ_CALLBACK- apologies for the mis…

Thanks for the clarification. Now I need to understand where that echo is coming from. This is a good clue: [image] jeff_fmod: I am not sure where the original echo was coming from- maybe something like mic monitoring being enabled in the headset?

Accessing real-time audio samples of incoming mic capture via DSPCallback

Unity

Leah_FMOD January 15, 2024, 1:42am 15

Hi, I’ve responded to your question in the other thread you posted here: DSP_READ_CALLBACK use 6 in/out channels instead of 1

Topic		Replies	Views
DSP_READ_CALLBACK use 6 in/out channels instead of 1 Unity unity , csharp	1	295	January 15, 2024
Record fmod in an video Unity	15	1806	August 17, 2024
Custom DSP, Copy to Side Buffer Unity	4	1296	December 10, 2018
FMOD Voice Recording access to real-time playable bytes/data (C++) FMOD Engine	10	212	February 10, 2025
How to get waveform data for lipsync when audio is muted? Unity	5	550	July 28, 2023

Accessing real-time audio samples of incoming mic capture via DSPCallback

Related topics