Distortion/static noise on microphone input

shades13 · September 18, 2020, 6:55am

So I’m trying to get Audio input going, and tweak Ryan’s solution a bit.

I’m using SoLoud as my base Audio library and it requires both -1.0 - 1.0 Float samples, and requests audio instead of accepts it.

I’m taking the data from the input device, putting it into a Uint8, then when SoLoud’s getAudio is called, I’m casting it to a float and doing memcpy over to the buffer SoLoud provides.

It seems like it’s close to working… I’m getting distortion/static that mirrors the dynamics of any microphone input… and if I print some of the float buffers they look like they should. I’m going wrong somewhere but.

github.com

verystack/junk/blob/master/microphone.cpp

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "soloud_microphone.h"
#include "SDL.h"
#include "../wav/dr_wav.h"

namespace SoLoud
{
    static SDL_AudioSpec gActiveAudioSpec;
    static SDL_AudioDeviceID gAudioDeviceID;
    bool isRecording = false;
    Uint32 gBufferByteSize = 0;

    Uint8* audioHoldingPattern = NULL;

    MicrophoneInstance::MicrophoneInstance(Microphone *aParent)
    {
        //initialize any startup stuff (fix this later)

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Can someone point me in the right direction?