1087412 - [FM Radio][Flame] Radio volume spikes to ear-shattering levels after interruption from system notification sound (from e.g. incoming text, or photo, or screenshot)

Status: RESOLVED DUPLICATE of bug 866353

(Firefox OS Graveyard :: Gaia::FMRadio, defect)

Description

[Daniel Holbert [:dholbert]]

STR:
 0. Have headphones plugged in. WARNING: be ready for loud noise. (maybe don't put your earbuds in all the way)

 1. Open FM Radio app & start listening to some radio station.

 2. Use volume rocker to reduce radio volume to a low level. (For demonstration purposes, let's say 1 bar, lowest possible still-audible level.)

 3. Now: trigger a system notification noise, by doing any of the following:
    (a) receive a text
    (b) take a screenshot by hitting power & volume-down
    (c) switch to camera app & take a photo

 Repeat step 3 several times. (The notification sound might not trigger it.)

ACTUAL RESULTS:
Some high fraction of the time (maybe 1/2 to 1/4 of the time), there's an EXTREMELY LOUD noise (usually a pop or a click, or really-loud radio noise), between the notification sound ending & the radio resuming. It can be loud enough to cause physical pain, if you're using earbuds.

This has made me hesitant to use the radio app, lest I receive a text & get a deafening click after the text notification noise; hence, adding "dogfood" keyword.

I'm using a Flame with FxOS 2.1 build, on the "aurora" update channel. (up to date as of last night)

Comment 1

[Daniel Holbert [:dholbert]]

(In reply to Daniel Holbert [:dholbert] from comment #0)
>  Repeat step 3 several times. (The notification sound might not trigger it.)

Sorry, I meant to say "The *first* notification sound might not trigger it."

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: audio recording of bug (low-volume radio, w/ spikes at 3s, 5s, 9s)

Here's an audio recording of the bug, from connecting my phone's headphone jack to my computer's mic jack.

In this recording, I took 3 photos using the camera, to trigger 3 system notification sounds. (a subtle "click")  There's a volume spike for each one.

The first spike is a pop, the second spike is extremely-loud radio noise, and the third spike has 2 bursts of extremely-loud radio noise.

(The radio audio level is pretty low here, just because that's the level it's recorded at when connecting the headphone jack w/ a reasonable-volume to my mic jack.)

Comment 3

[Daniel Holbert [:dholbert]]

I was unable to repro this on my Unagi, running a locally-made FxOS 2.2 build from a few days ago.

(So, this might be Flame-specific, or it might've been fixed in 2.2, or the Unagi might just be immune for some reason.)

This has been an issue on my Flame for quite a while (in 2.0 and 2.1); I only just now got around to making a recording of the issue so that I could file a useful bug.

Comment 4

[Daniel Holbert [:dholbert]]

My flame build is:
 OS Version: 2.1.0.0-prerelease
 Build Id: 20141020161201
 Git commit info: 2014-10-20 21:49:20   db34a4b7

Comment 5

[Daniel Holbert [:dholbert]]

Duping to bug 866353, which seems to have been filed on this last year.