RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity
1ed4c3a230
RIOT/tests/driver_dac_dds
History
Benjamin Valentin c696fd7a0b tests/driver_dac_dds: use clearer hello recording 
The "Hello World" sample is really hard to hear on the noisy DAC / speaker
setup on my same54-xpro.

Replace it with a clearer sample from Wikimedia Commons and fix the ffmpeg
command line.
2020-12-13 02:05:54 +01:00
..
hello.raw tests/driver_dac_dds: use clearer hello recording 2020-12-13 02:05:54 +01:00
main.c tests: add samd10-xmini to Makefile.ci 2020-12-11 18:33:31 +01:00
Makefile tests: add samd10-xmini to Makefile.ci 2020-12-11 18:33:31 +01:00
README.md tests/driver_dac_dds: use clearer hello recording 2020-12-13 02:05:54 +01:00

README.md

About

This is a manual test, and demo application for DAC DDS.

Usage

This application will initialize the single default DAC DDS channel, and play sine, square, sawtooth waves or a greeting audio on it as requested on the command line.

Typical usage:

> hello
> sine 440 2

Audio source and license

hello.raw is an audio rendition of GeoTrinity saying "Ahoy!". It was obtained from https://en.wikipedia.org/wiki/File:GT_Ahoi_Deutsch_GT.ogg where it is annotated to be licensed under CC-BY-SA 3.0 international.

It was converted and trimmed using:

$ ffmpeg -i GT_Ahoi_Deutsch_GT.ogg -ac 1 -ar 8000 -f u8 -c:a pcm_u8 hello.raw
$ python3 -c "s = open('hello.raw', 'rb').read(); s = s.strip(b'\x80') + b'\x80'; open('hello.raw', 'wb').write(s)"