On the page https://www.alsa-project.org/wiki/Tutorials_and_Presentations there are dead links.
ALSA 0.9.0 HOWTO http://www.suse.de/%7Emana/alsa090_howto.html - Dr Matthias Nagorni has writen a comprehensive tutorial for audio application developers. is dead. The article has been removed.
Howto use the ALSA API http://equalarea.com/paul/alsa-audio.html - Paul Davis has also written a brief explanation. is dead. His site has been removed from the hosting site.
ALSA Sequencer (draft) http://www.alsa-project.org/%7Efrank/alsa-sequencer/ - Frank van de Pol's draft on programming the alsa sequencer. is dead, 404 error.
Kernel OSS-Emulation http://www.alsa-project.org/%7Eiwai/OSS-Emulation.html - Takashi Iwai has written some notes on how ALSA handles OSS applications. is dead, 404 error.
It is worth trying to restore them because there are very few resources on ALSA programming.
Regards Alex