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"Beyblade V-Force - Ultimate Blader Jam (USA)" audio click/pops #356

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clobber opened this issue Aug 22, 2016 · 3 comments
Closed

"Beyblade V-Force - Ultimate Blader Jam (USA)" audio click/pops #356

clobber opened this issue Aug 22, 2016 · 3 comments
Labels
hardware:audio Issues in the audio subsystem platform:GBA Game Boy Advance-related issues severity:minor bug Issues that only have a minor impact on the library
Milestone
mGBA 0.9.0

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@clobber
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clobber commented Aug 22, 2016

mGBA 0.4.1, OS X 10.11

You can replicate this by loading the game, going to Options > Audio, turn down both the SFX and MUSIC and you will clearly hear the distortion. Wondering if this also happens on real hardware, so maybe someone can check it out with a flash cart.
@endrift
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endrift commented Aug 24, 2016

This does not happen on hardware. This is almost certainly a timing issue with how samples are getting queued.

@endrift endrift added this to the 0.5.1 milestone Aug 24, 2016
@endrift endrift added severity:minor bug Issues that only have a minor impact on the library platform:GBA Game Boy Advance-related issues labels Aug 24, 2016
@endrift endrift modified the milestones: 0.5.1, 0.5.2 Sep 27, 2016
@endrift endrift added the hardware:audio Issues in the audio subsystem label Nov 3, 2016
@endrift endrift modified the milestones: 0.5.2, 0.6.0 Dec 31, 2016
@endrift endrift modified the milestones: 0.6.0, 0.6.1 Apr 22, 2017
@endrift endrift modified the milestones: mGBA 0.6.1, mGBA 0.6.2 Sep 21, 2017
@endrift endrift modified the milestones: mGBA 0.6.2, mGBA 0.7.0 Jan 15, 2018
@endrift endrift modified the milestones: mGBA 0.7.0, mGBA 0.7.1 Sep 29, 2018
@endrift endrift modified the milestones: mGBA 0.7.1, mGBA 0.7.2 Feb 25, 2019
@endrift endrift modified the milestones: mGBA 0.7.2, mGBA 0.8.0 May 25, 2019
@endrift endrift modified the milestones: mGBA 0.8.0, mGBA 0.9.0 Oct 5, 2019
@endrift endrift mentioned this issue Oct 30, 2019
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@endrift endrift mentioned this issue Jan 23, 2020
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@endrift
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endrift commented Jan 25, 2020

Seems to be an issue with the timing of the audio DMAs; in mGBA, the audio DMA fires every 16 ticks of TM1, aligned to xxx0, but in no$gba (where the bug does not occur) it's closer aligned to xxx6. As a result, the final audio DMA reads one 16-byte segment more (for 16 more samples).

@endrift
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endrift commented Feb 25, 2020

https://github.com/marijnvdwerf/gba-beyblade-vforce/blob/master/src/sound.c this may help

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Labels
hardware:audio Issues in the audio subsystem platform:GBA Game Boy Advance-related issues severity:minor bug Issues that only have a minor impact on the library
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Milestone
mGBA 0.9.0
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