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shanshe / Z3660

Amiga 4000 CPU accelerator board based on A3660 and Z-turn FPGA board
GNU General Public License v3.0
55 stars 8 forks source link

Click/Pop sound when starting AmigAmp #12

Open DarrenHD23 opened 3 months ago

DarrenHD23 commented 3 months ago

When you start AmigaAMP using the MHI driver, you hear a momentary (fairly loud) click or pop sound. And then if you start to play back an mp3 stream, you hear it again. Version1.03 Beta 8 and lower are affected. Tested on AA3000+, Z3660 in 060 mode. It is not always present but most of the time you hear it.

shanshe commented 3 months ago

Thanks @DarrenHD23, probably my audio bar system has an anti pop/click filter, as I don't hear it. I will look for some old speakers... I replaced the ZZ9000 AX DSP, by a few band filters. All of them have buffers to implement the IIR filters. I will review them and see if they are cleared before used. Also there is a double line buffer that should be cleared (but in this case I clear it at the init of the ARM), so I will see if it is necessary to clear it after stop playing audio (or before start playing audio). I will write here the progress in this issue...