How to manipulate raw audio sample data

[GWRon]

As midimaster in the syntaxbomb forum asked on audio manipulation I thought I give it a try with soloud (in Freeaudio I got it working already).

Seems I am missing something -as it does not play anything (it should play "noise"):

SuperStrict
Framework Brl.StandardIO
Import audio.soloud
Import audio.audiominiaudio
Import Brl.GLMax2D
Import Brl.Bank
Import random.xoshiro

'open window
Graphics 800, 600
SetAudioDriver("SoLoud")


'prepare sound data block
Local soundData:TBank = CreateBank(2048)
For local i:int = 0 until soundData.capacity()
	soundData.PokeByte(i, Byte(Rand(255)))
Next

rem
'for now this returns null ... (there is no "LoadSound()" way to retrieve
'an "empty" TSound created by Soloud-drivers
Local sound:TSound = LoadSound(null, SOLOUD_SOUND_WAV | SOUND_LOOP)
'sound._sound = TSLAudioSource
Local slWav:TSLWav = new TSLWav
slWav.loadMem(soundData.Lock(), int(soundData.capacity()), False, False)
TSoloudSound(sound)._sound = slWav
endrem

'rem
Local sound:TSoloudSound = new TSoloudSound
sound.isLooped = True
sound._sound = new TSLWav
TSLWav(sound._sound).loadMem(soundData.Lock(), int(soundData.capacity()), False, False)


PlaySound(sound)


Repeat
	Cls
	
	DrawText("SPACE for random sound data", 0,0)
	Flip
Until KeyHit(KEY_ESCAPE) Or AppTerminate()

Is there a way to obtain the sound samples buffer/byte ptr/mem block so we can fill it with our own data (eg incoming stuff from a midi keyboard or so) ?

[GWRon]

Having Import Brl.Oggloader and replacing/appending

TSLWav(sound._sound).loadMem(soundData.Lock(), int(soundData.capacity()), False, False)

with

sound._sound = sound.TryLoadSound(ReadStream("a valid ogg file.ogg"), SOUND_LOOP)

Plays the music - so the initial setup (audio driver etc) is working.