Low-Pass-Filter/EQ for phone calls

asked 2020-02-15 21:56:25 +0300

Johannes W gravatar image

updated 2020-02-16 05:22:49 +0300


is there any possibility to add a low-pass filter for phone calls into the audio route? The problem is, that some of my contacts phones generate some piercing high-pitched sounds that are really painfull to hear. To protect my hearing I wish to install a low-pass filter or eq to cut high frequencies that are out of the human voice frequency spectrum.

Are there any options? Is Sailfish OS using pulse-audio, so that I could load a pulse-audio eq module?


edit retag flag offensive close delete


Alas only some temporary fix ideas for you - my hearing is similarly sensitive with a mild sensory processing disorder:

  • eq filter on expensive bluetooth headset

  • ear plugs/tissue paper in your ears

  • switch network preference to 3g/2g as the treble / high frequencies are less on those technologies.- of course at the price of your data network speed.

It looks quite a niche interest so I suspect that interest might be limited...

Good luck with it!

thepeckhambassplayer ( 2020-02-16 11:15:19 +0300 )edit

AFAIK there is no difference in encoding voice between 2g and 3g. And Sailfish never uses voice in the PS-Domain (IP-Networks). Therefore changing settings should make no difference. When connected to "4G/LTE" still "GSM/UMTS" is used for the Voice-Call (CS-Domain)

fridl ( 2020-02-18 12:14:34 +0300 )edit