[hatari-devel] Gain too low in DmaSnd_LowPassFilter for STE ?

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Hi

as discussed here 
http://atari-forum.com/viewtopic.php?f=16&t=29615&p=299270#p299270 the 
STE DMA sound samples can't be heard when using an output freq < 50066 
Hz in Hatari (for example, try "salamander : planet latis")

At 50066 Hz you hear the samples, but at 48 kHz you don't hear them 
anymore. This is because 50066 explicitely turn DMA low pass filter OFF 
in the code path.

David, do you think it would be possible to increase the gain in 
DmaSnd_LowPassFilter to hear the samples even when using < 50 kHz output 
freq ?

Note that in this music demo, samples already have a low volume (if you 
just listen to the wav file with Audacity for example), so maybe the 
fact that the sample don't use the full 8 bit range is fooling the 
filter and you get an even lower volume in the end ?

Nicolas