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FGCom (before 3.0): Difference between revisions
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→Solving Audio-Problems
(→Solving Audio-Problems: OpenAL-soft uses a different configuration file format.) |
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====Solving Audio-Problems==== | ====Solving Audio-Problems==== | ||
The following assumes that you have problems even after you did set up your system as described in [[Verifying your Audio-System]]. | The following assumes that you have problems even after you did set up your system as described in [[Verifying your Audio-System]]. | ||
=====Poor Audio Quality===== | |||
*Check especially your microphone-cables for a good quality shielding and root them as far away as possible from electromagnetic noise emitters (motors, blowers, AC-cabling, lamps, etc.). | *Check especially your microphone-cables for a good quality shielding and root them as far away as possible from electromagnetic noise emitters (motors, blowers, AC-cabling, lamps, etc.). | ||
*It | *It may help to place your sound-card into a different slot | ||
*A (digital) USB-headset helps in avoiding noise and feedback problems | *A (digital) USB-headset helps in avoiding noise and feedback problems | ||
=====Background noise raising with time===== | |||
This is typical for an active automatic “Boost”, “Gain”, or “Amplifier” device, or a microphone set too sensible. i.e. while there is no “real sound” the devices will try to “boost” the “background noise” to a real sound level – and that may hurt your ears. | This is typical for an active automatic “Boost”, “Gain”, or “Amplifier” device, or a microphone set too sensible. i.e. while there is no “real sound” the devices will try to “boost” the “background noise” to a real sound level – and that may hurt your ears. | ||
*'''Basically:''' Do not keep the PTT pushed longer than absolutely necessary, before and after speaking!<br> | *'''Basically:''' Do not keep the PTT pushed longer than absolutely necessary, before and after speaking!<br> | ||
*Try to say something and the sound-system should adjust to that – but the problem will reappear after a short while. '''You should always switch off your microphone if you are not really talking – and keep the microphone level as low as possible!''' | *Try to say something and the sound-system should adjust to that – but the problem will reappear after a short while. '''You should always switch off your microphone if you are not really talking – and keep the microphone level as low as possible!''' | ||
*If anyhow possible, do not use automatic boosters. If your microphone does need such a support, keep it to a minimum. Especially in the FGCom application the microphone output needs less power because the central server does equalize the loudness of all users. | *If anyhow possible, do not use automatic boosters. If your microphone does need such a support, keep it to a minimum. Especially in the FGCom application the microphone output needs less power because the central server does equalize the loudness of all users. | ||
=====Unexpected behavior===== | |||
Especially “high quality” sound-cards may get you into trouble, because e.g.: | Especially “high quality” sound-cards may get you into trouble, because e.g.: | ||
*they may monitor how long the microphone was not used and switch it off after some timespan (without you noticing it) | *they may monitor how long the microphone was not used and switch it off after some timespan (without you noticing it) | ||
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*or they may set some slide controls to “0” (especially microphone sliders) | *or they may set some slide controls to “0” (especially microphone sliders) | ||
*some do switch the microphone only after pushing '''and''' releasing the space-bar – while we want to change the microphone-status only while the space-bar is pushed down! (This may not affect a PTT asigned to a joystick)<br> | *some do switch the microphone only after pushing '''and''' releasing the space-bar – while we want to change the microphone-status only while the space-bar is pushed down! (This may not affect a PTT asigned to a joystick)<br> | ||
So know your standard settings and check if they have changed (without your written permission!) | So know your standard settings and check if they have changed (without your written permission!) | ||
=====Special for Linux (.alsoftrc)===== | |||
(ref [[Linux software audio mixing with FlightGear]]) <br> | (ref [[Linux software audio mixing with FlightGear]]) <br> | ||
check your Home-directory (“~/”) for a file "'''.alsoftrc'''" | check your Home-directory (“~/”) for a file "'''.alsoftrc'''" | ||
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capture = plug:dsnoop | capture = plug:dsnoop | ||
The system wide OpenAL-soft configuration file may be /etc/openal/alsoft.conf or similar. It usually contains comments describing all possible configuration options. | The system wide OpenAL-soft configuration file may be /etc/openal/alsoft.conf or similar. It usually contains comments describing all possible configuration options. | ||
=====USB-Headsets-Problems with Linux (Ubuntu)===== | |||
The following is based/verified on Ubuntu, but should be similar on other distributions: | The following is based/verified on Ubuntu, but should be similar on other distributions: | ||
*If Recording is ok '''and''' the f910-Test looks alright in the window, '''but''' there is no delayed response: | |||
*If Recording is ok and the f910-Test looks alright in the window, but there is no delayed response: | |||
**type "cat /proc/asound/modules" into the command window, e.g.: | **type "cat /proc/asound/modules" into the command window, e.g.: | ||
$ cat /proc/asound/modules | $ cat /proc/asound/modules | ||
0 snd_usb_audio | 0 snd_usb_audio | ||
1 snd_hda_intel | 1 snd_hda_intel | ||
If that displays multiple devices (as shown in the above list, which is the result '''after''' doing the following!), then the USB-Headset should be in the "0" position. If this is not the case, notice the name of your USB-device and edit it. e.g.: | **If that displays multiple devices (as shown in the above list, which is the result '''after''' doing the following!), then the USB-Headset should be in the "0" position. If this is not the case, notice the name of your USB-device and edit it. e.g.: | ||
"sudo gedit /etc/modprobe.d/alsa-base" | "sudo gedit /etc/modprobe.d/alsa-base" | ||
add as last line into that file, e.g.: | **add as last line into that file, e.g.: | ||
options snd_usb_audio index=0 | options snd_usb_audio index=0 | ||
<br> | |||
*If you use '''Festival''' (the Text/Speech AddOn) | |||
**and | |||
*** it works OK when running alone | |||
*** but runs int error "can't open /dev/dsp" when running with FGFS (and/or other applications) | |||
** then add a TextFile ".festivalrc" into your home-directory, containing: | |||
(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE") | |||
(Parameter.set 'Audio_Method 'Audio_Command) | |||
====Helpfull INTERNET Adresses==== | ====Helpfull INTERNET Adresses==== | ||