Audio Quality Comparisons

Figures show that over 50% of visits to public authority website originate from mobile devices (2014) so Audiominutes uses the least bandwidth possible to get the message across. Improving performance and reducing the possibility of bill shock. In the example below, you can hear the effect of the compromise.

Original audio routed from sound source to ALSA at 44,000 Hz (File size 786 kb)

 

Down sampled audio to 11,025 hz, mixed to mono and without filtering (File size 184 kb)

 

Audiominutes quality – Down sampled audio to 11,025 hz mono and with decimation filtering applied (File size 184 kb)

 

Audiominutes quality – As above but encoded as an MP3. This is the format used for live broadcasts and recording playback (File size 17 kb)

 

For reference, this is the same file played at GSM telephone quality

 

Credit to Margarita and https://www.freesound.org/people/acclivity/sounds/33711/ for the demo audio