FM Transmitter periodic beep

[白い熊]

I'm trying to use the N900 FM Transmitter in my car.

It seems it's emitting a periodic beep every 5 seconds or 10 seconds or so... Otherwise the signal is good, but the beep is annoying...

If I use an external transmitter plugged into the earjack on the same frequency, no beep is heard, so it's no external beep.

Anyone know what this could be? Or is it maybe that the signal IS too weak and the beep is from the car's audio system signalling its weakness, while with the external FM transmitter the signal is stronger?

[GeneralAntilles]

It's to tell you it's still alive and transmitting. Start sending audio and it'll stop.

[白い熊]

Problem is it doesn't stop. I'm sending audio and it's beeping throughout.

Can I disable it manually?

[SR90]

Are you trying to transmit audio to a taken fm station?
You have to try and find a vacant one in your area , that is probably it .
keep us posted if it fixes your problem .

[Untouchab1e]

Problem is it doesn't stop. I'm sending audio and it's beeping throughout.

Can I disable it manually?

I think its supposed to beep to tell you that its still alive and transmitting. It should stop or at least be inaudiable when playing music though..

[DarkPand0r]

It only plays when theres no Audio for me, and then after a short amount of time the FM Transmitter turns off, which does get rather annoying.

[GeneralAntilles]

Problem is it doesn't stop. I'm sending audio and it's beeping throughout.


Playing audio how?

[白い熊]

Playing audio how?
I play audio through mpd, it's transmitted, however the beep is mixed in.

I don't wanna use the internal music player for audio, so maybe it'd stop if using that. That's why I'd like to disable the beep manually...

[Alan_Peery]

I play audio through mpd, it's transmitted, however the beep is mixed in.


Maybe mpd is sending audio, but failing to set a flag saying "I am an audio player (so pause me when the phone rings)".

I don't know that any such flag exists, this is just speculation.

[白い熊]

Yeah, something of this sort is happening it seems, don't know whether it's dbus or whatever, that should be notified, and then stop the beeps or what have you.

So it seems, I either need to somehow set the info, that audio is streaming, or turn of the beep by hand, either of the two.

The question is how?

[qwerty12]

echo 0 to:
/sys/bus/i2c/devices/2-0063/tone_deviation
/sys/bus/i2c/devices/2-0063/tone_frequency
/sys/bus/i2c/devices/2-0063/tone_off_time
/sys/bus/i2c/devices/2-0063/tone_on_time

[白い熊]

OK, I'll try these in the car to see if they stop the beep...

[TNiga]

I play audio through mpd, it's transmitted, however the beep is mixed in.

Could you paste your mpd.conf here, at least the audio device part? I have something wrong with it because it doesn't always play and when it plays there is random silence every now and then.

[白い熊]

audio_output {
type "alsa"
name "My ALSA Device"
device "hw:0,0"
format "44100:16:2"
}
Don't remember if this is the default, or had to tweak it.

Now, there IS a catch with mpd on the N900, and that is, if you just use it and play, the sound is very quiet, even when maxed out, maybe this accounts for your intermittent silence.

What I have to do, everytime I start playback, is to click on some sound file in the N900's file browser, AFTER mpd has already started playing. This will bring up the internal audio player, which shows having started to play the song, but it'll not play it, however the sound volume will jump right up, with mpd continuing to play but with the loud volume now.

After this it works perfectly...

[TNiga]

That doesn't work for me very nicely. It plays for a while and then it goes mute and resumes only when I touch the screen, and then same thing again.

[白い熊]

Does your screen go blank also at the same time as it goes quiet?

[TNiga]

Nope.

(this is just to fill up the minimum length of a message)

[TNiga]

By the way, where have you installed mpd from?

[白い熊]

Full GNU Emacs solution:
http://sumoudou.org/%E7%9B%B8%E6%92%B2%E5%A4%96%EF%BC%9ADisabling%20th e%20FM%20transmitter%20beep.html

[Alex Atkin UK]

As someone else mentioned above, is it also possible to disable the FM Transmitter automatically turning off?

I was streaming di.fm in the car recently and every time I lost the signal it would start beeping (which I found useful personally, to know it hadn't crashed or something), but if it took too long to recover it would turn off the FM Transmitter so I would have to pick up the N900 and turn it back on again. Only for it to happen again, and again, it was super annoying especially as I had it plugged into USB at the time so it shouldn't be worrying about conserving battery life if currently charging.

[redhotfoo]

echo 0 to:
/sys/bus/i2c/devices/2-0063/tone_deviation
/sys/bus/i2c/devices/2-0063/tone_frequency
/sys/bus/i2c/devices/2-0063/tone_off_time
/sys/bus/i2c/devices/2-0063/tone_on_time

Does this have to be applied only once or after every startup?

[J4ZZ]

echo 0 to:
/sys/bus/i2c/devices/2-0063/tone_deviation
/sys/bus/i2c/devices/2-0063/tone_frequency
/sys/bus/i2c/devices/2-0063/tone_off_time
/sys/bus/i2c/devices/2-0063/tone_on_time

Hi there, it's still beeping here. And all files already contained 0. So why am I still having this annoying beep.

Thanks for helping,

greetz,

J4ZZ

[dr_frost_dk]

Those beeps are they not caused by the radio in your car?
I have had the same problem but not with the N900 but with those MP3 FM players, and only on some brands of car radio.

So everybody please also type your car radio brand & "version", this could be the radio and not the N900, i saw the last code putting the transmitter in high gear, this could help more then the other lines.

[redhotfoo]

The beep definetely comes from the N900.

How can I stop this beeping and the auto switch off. Echo to 0 seems not to work. Any expert here?