Hacker News new | ask | show | jobs
by hexwab 3570 days ago
It may not work in dosbox, but mushroom.ovl is just raw 8-bit[1] linear audio sampled at 8kHz so you can load it up in your raw-audio-capable app of choice. On linux try "aplay mushroom.ovl", for example.

[1] Actually only 6 bits per byte are used; presumably this was done to improve decoding speed or something.
2 comments
rzzzt 3570 days ago
Most of these applications employ this one weird trick to get digitized sound out of the speaker: https://en.wikipedia.org/wiki/PC_speaker#Pulse-width_modulat...

The result is 6 bits of resolution, along with a high pitched squeak during playback, depending on the output circuitry and speaker characteristics (it's less noticeable when a low-pass filter is added).

link
45h34jh53k4j 3570 days ago
Cool! Read as: signed 8-bit PCM at 8000 Hz with Audacity. I had to normalize it to remove a DC bias and reduce the volume.

curl http://pastebin.com/raw/uunJFtcK | base64 -D > mushroom.mp3

link