Fix Tethys asset
When played on a device with MBDRC or on headphones, flaws in this
asset become apparent: hiss throughout the sound, and positive
true-peak on the first attack on the right channel.
This new version has reduced noise through substraction of the
noise print at the end, and fadeout to silence. The asset is
encoded with a 3dB headroom and a slight EQ.
diff --git a/data/sounds/notifications/ogg/Tethys_48k.ogg b/data/sounds/notifications/ogg/Tethys_48k.ogg
index a9d8bbd..355d522 100644
Binary files differ