Re: [hatari-devel] Regression in Falcon sound

[Anders Eriksson <evldhs@xxxxxxxxxxxxxx>]

On Wednesday, 17 April 2024 at 20:59, Laurent Sallafranque <laurent.sallafranque@xxxxxxx> wrote:

1. DUMP v1.71 (DSPMOD) module player + Hyperbased module (or any other

module)

- Old bug: When starting a second time, there's old sample data played
for a frame or two, VGA+RGB (also present in 2.4.1)
- Old bug: Each time starting the modplayer the left/right channels can
be swapped around, VGA+RGB (also present in 2.4.1)
- Regression: Big stuttering in VGA mode after some time (like skipping
forward or backwards, the moment when it happen differs each test run
(OK in 2.4.1)
- Regression: Same as above in RGB mode, but much more subtle and more
often (OK in 2.4.1)

DUMP: https://demozoo.org/productions/95633/
Hyperbased: https://demozoo.org/music/2233/

I've given a try to this. (RGB mode emulation)

The sound is clear cristal for me.

I haven't noticed any glitch

I'm running 14 Mo + PE + CE + MMU + 24 bits adressing + Accurate FPU (all chech ON)

CPU : 68030 CPU clock 16 Mhz

OK, you made me unsure if I had imagined it, so let's try again..

So I opted for a less busy Protracker file, and there are absolutely some hickups. Much more subtle than in VGA, but they are there.

As Hataris own recording won't show the problem, I used OBS in lossless mode to capture system sound.

Hatari 2.4.1

https://www.dropbox.com/scl/fi/uptsioberxa0erg8dsyzv/beetle_241.wav?rlkey=05boyqbiiotrjbs933mw50nov&st=t5ueowb8&dl=1

Hatari 2.5.0 (build from April 17)

https://www.dropbox.com/scl/fi/aayi3e70nmsc3hmdymd29/beetle_250.wav?rlkey=gir5i7wdayvgfvsudhw6lxpe3&st=61a7b6x8&dl=1

I used this Protracker file: https://demozoo.org/music/283867/

Some places in the 2.5.0 recording with problems:

4.55

7.55

14.62

17.65

34.27

37.32

47.44

50.45

Hatari config:

hatari --machine falcon --dsp emu --cpulevel 3 --cpuclock 16 --fpu 68882 --cpu-exact 1 --compatible 1 --addr24 1 --timer-d 0 --memsize 14 --window --frameskips 0 --drive-led false --monitor rgb --avi-vcodec png --png-level 2 --sound 49170 --fast-boot 1 --tos 404.img --gemdos-drive c --harddrive Falcon030  --max-width 832 --max-height 600 --force-max true

Host:

macOS 14.4.1 with M1 chip.

--

Anders Eriksson

ae@xxxxxx