Spatialization is not working for me

[paulross80]

Hello. Here is my code

auto audioEngineConfig = ma_engine_config_init();
audioEngineConfig.listenerCount = 1U;
if (ma_engine_init(&audioEngineConfig, &audioEngine) != MA_SUCCESS)
    // error message
ma_engine_set_volume(&audioEngine, m_masterVolume);
if (ma_sound_group_init(&audioEngine, 0U, nullptr, &soundGroup) != MA_SUCCESS)
    // error message
ma_sound_group_set_volume(&soundGroup, volume);
ma_sound_group_set_spatialization_enabled(&soundGroup, MA_TRUE);

My player position is in OpenGL coordinates, except Y position is 0 on the top of the window
I have a facing vector for my player, it's X value is -1 for left, 1 for right
I want the player to be the listener
I'm using this code every time the player moves:

ma_engine_listener_set_position (&audioEngine, 0, position.x, -position.y, 0.0f);
ma_engine_listener_set_direction(&audioEngine, 0, direction.x, direction.y, 0.0f);

The problem is: now I don't hear any sound at all. Not even the sounds the player emits. What I'm doing wrong?
If I turn off spatialization, I can hear everything

[mackron]

It could just be that the sound is positioned too far away from the listener. What is the position of the listener and sound? If you call ma_sound_set_min_gain(&sound, 0.5f), do you hear anything?

[paulross80]

If you call ma_sound_set_min_gain(&sound, 0.5f), do you hear anything?

Nothing

Now I'm setting sound position every time I play a sound ma_sound_set_position(m_sound, position.x, position.y, 0.0f);. These coordinates are screen coords (in pixels). I have noticed something. If I move the player to the 0,0 position of the screen, and using direction -1,0, the sound can be heard at full volume. At direction 1,0 it is reduced significantly, but can still be heard. On any other position of the player, nothing is heard. Do I need to use a normalized coordinate system for miniaudio? Or can I specify my own coordinate system?

[mackron]

The coordinate system is based on OpenGL's where X is left/right, Y is up/down and Z is in/out. You can use whatever coordinate system you want, but you'll need to transform it appropriately when you pass it into miniaudio. It uses an attenuation model that uses the concept of a rolloff. The more rolloff, the faster the sound disappears as you move further away. Maybe try calling ma_sound_set_rolloff(&sound, rolloff) and playing around with the rolloff parameter.

My suspicion is that the sound and the listener are too far away. When the sound cannot be heard, what is the position of the listener and the sound? If you have the listener at position 0,0 and a sound at position -1,0, you should clearly hear it out of the left speaker (and a little bit in the right).

[paulross80]

Nothing works
I've tried rolloff values 0.9, 0.5
Also tried using ma_sound_set_pinned_listener_index(m_sound, 0)

My sound playing code:
if (useSpatialization)
{
ma_sound_set_position(m_sound, position.x, -position.y, 0.0f);
ma_sound_set_direction(m_sound, direction.x, direction.y, 0.0f);
}
ma_sound_start(m_sound);

The parameters are the current position of the entity (world coordinates) and it's direction (-1 left, 1 right)

The listener is positioned in the same way:
if (m_useSpatialization)
{
ma_engine_listener_set_position (&audioEngine, listener, position.x, -position.y, 0.0f);
ma_engine_listener_set_direction(&audioEngine, listener, direction.x, direction.y, 0.0f);
}

I update the listener position and direction every frame
Anything else I can try?

[mackron]

You need to tell me the exact values of the position of the listener and the position of the sound. All you've said is that it's the "current position of the entity" which is completely meaningless to me.

I did a quick test here, and when the sound is 100 units away, it'll be very quiet - almost inaudible. When it's at 1 unit away it's very audible. If your sound is, say, 1000 units away you just won't here anything.

[paulross80]

Right, sorry about that
I've found two functions to get the listener data
ma_vec3f listenerPos = ma_engine_listener_get_position(audio.getAudioEngine(), 0U);
ma_vec3f listenerDir = ma_engine_listener_get_direction(audio.getAudioEngine(), 0U);

I get this data on the console every time the player emits the gun shot sound
*** Player emits sound from pos: 1488, 224.00002 dir: -1, 0. Listener pos: 1488, 224.00002 dir: -1, 0
And this is when the enemy fires
*** Enemy emits sound from pos: 890.8594, 1195 dir: -1, 0. Listener pos: 608.8897, 1184 dir: 1, 0

Players and enemies can move in a world of size 2000 x 2500 pixels
I can only hear a (loud) sound emitted by the player when the player position is near 0,0
In this position it is almost inaudible:
*** Player emits sound from pos: 51.611393, 0 dir: 1, 0. Listener pos: 51.611393, 0 dir: 1, 0