Thanks for the tip. I already obtain these values from PIC_TICKS in PCSPEAKER_SetCounter. The problem is that each 'tone' lasts until another tone begins. (I can't find the timings for the pauses inbetween.)

Hi, I am currently trying to reproduce the PC speaker sound from old games using dosbox. So far I have managed to capture the frequencies from pcspeaker.cpp (PCSPEAKER_SetCounter), and the ticks between each "tone". But I can't seem to find the duration of the pauses in between the speaker tones. …