Bad Apple Demo, will start with no audio randomly.

[James-F2]

https://www51.zippyshare.com/v/ttnvGs7Z/file.html (freeware). Sometimes the audio will not play at random when loading the rom. Tested with official 20190927 build.

EDIT: more info. http://forums.nesdev.com/viewtopic.php?t=14856 It uses Indirect HDMA for audio decompression, in 32kHz.

Source code and rom file for this demo is available in the official page: https://www.smwcentral.net/?p=viewthread&t=85373&page=1

[srg320]

Without this commit 0aafeb3568eb13281bca628a10946b2c6fc46c9b demo has a sound always, otherwise Magical Drop freezes in Endless Mode. I think the game is more important than the demo. Nevertheless, I am interested to know how the demo works on real console.

[James-F2]

I think a lot more people are familiar with the Bad Apple demo than Magical Drop. I have 5 SNES consoles, I will test the Bad Apple demo and report back.

[James-F2]

On real hardware the demo audio starts consistently, BUT, audio sometimes stops in the middle of the demo while video continues running. This audio stopping happens in the different spots for each console. One console stops in one place, other console stops in other place, but the stopping place is consistent, but does not always happen.

Also, I can see a flickering scanline on the bottom left corner with the hardware which does not appear in the core or bsnes.

[srg320]

In the core the sound also sometimes stopped somewhere in the middle of the video, so we slightly adjusted DSP frequency because of this demo (but this is not entirely correct). Audio stopping happens in the different spots because the frequency of both quartz resonators (21MHz and 24MHz) is slightly different on each console.

[MP2E]

This appears to be fixed as of #148

[James-F2]

Fixed.