I spoke with Phcoder (the original author) about this ages ago, and he recommended not actually playing sound with it, but using it with an audio cable between the output device and input device. I assume you'd be able to use it at a much higher speed that way.
Martin Dec 7, 2021, 10:37 by nic.c3...@gmail.com: > On Tue, Dec 7, 2021 at 10:00 AM Peter Stuge <pe...@stuge.se> wrote: > >> What if you build coreboot for emulation/qemu with spkmodem console? Does >> QEMU produce actual sound? I don't know whether QEMU has a speaker output. >> > > To add to this, QEMU will produce tones with the spkmodem console if > you add "-soundhw pcspk" to your qemu command line. I have tried it, > but spkmodem-recv was unable to decode the signal. I do recall being > able to get it working once on actual hardware by modifying the timing > in spkmodem.c such that the baud rate was some ridiculously low number > like 10 baud, and then messing with the #defines in spkmodem-recv, but > I don't remember what I set those defines to. > > Nicholas > _______________________________________________ > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org > _______________________________________________ coreboot mailing list -- coreboot@coreboot.org To unsubscribe send an email to coreboot-le...@coreboot.org
