Q Bytes World » 2016

I created a backup of the NOOBS disk using Win32 Disk Imager to READ and can now restore it with a WRITE using Win32 Disk Imager. Here is my backup: pi3_backup.img.rar (1.01GB).

Windows may not always work per the Installing Operating System Images guild, I’ve also use pwfree91.exe and SDFormatter.

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Aug 21 2016

Sound Driver

Category: Raspberry Pi — dq @ 5:08 PM

http://plugable.com/2014/11/06/how-to-switch-to-usb-audio-on-raspberry-pi/

http://www.instructables.com/id/Use-USB-Sound-Card-in-Raspberry-Pi/?ALLSTEPS

In the Debian “Squeeze” image the ALSA sound drivers are considered experimental and have been disabled by default. To enable sound you need to type the commands below into the command line :

sudo apt-get install alsa-utils

That will install the required sound driver files and tools. Type “Y” when prompted. The following command will load the sound driver :

sudo modprobe snd_bcm2835

By default the output is set to automatically select the interface (HDMI if available otherwise analog). You can force it to use a specific interface using :

sudo amixer cset numid=3 <n>

Where <n> is the required interface : 0=auto, 1=analog, 2=hdmi. To force the Raspberry Pi to use the analog output :

sudo amixer cset numid=3 1

You will need to run the modprobe command again when your Pi is rebooted/restarted.

Playing A WAV File

In order to play a WAV file we need a file to play. Type the following command to download a test WAV file :

sudo wget http://www.freespecialeffects.co.uk/soundfx/sirens/police_s.wav


sudo wget http://www.freespecialeffects.co.uk/soundfx/sirens/police_s.wav

sudo wget http://www.freespecialeffects.co.uk/soundfx/computers/bleep_01.wav

Now we can play it :

sudo aplay police_s.wav

If you are lucky the sound will play through your speakers or headphones.

I tried a number of WAV files but only some of them played. Hopefully this will be resolved in future releases of the sound drivers.

Playing an MP3 Using MPG321

There are numerous ways to play MP3s from the command line but I tend to use MPG321. This can be installed using :

sudo apt-get -y install mpg321

Once installed we can grab an MP3 to experiment with :

wget http://www.freespecialeffects.co.uk/soundfx/household/bubbling_water_1.mp3

The MP3 file can be played using :

mpg321 bubbling_water_1.mp3

The volume can be adjusted using the ‘g’ command line option. In the example below I set the volume to 50% :

mpg321 -g 50 bubbling_water_1.mp3

USB Sound: https://www.pubnub.com/blog/2015-10-14-text-to-speech-audio-broadcast-with-raspberry-pi/

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Aug 21 2016

KODI

Category: Raspberry Pi — dq @ 4:55 PM

KODI replaces XBMC. –> HERE.

http://kodi.wiki/view/HOW-TO:Install_Kodi_on_Raspberry_Pi

http://openelec.tv/forum/126-3rd-party/75537-fm-radio-receiver-for-kodi-for-the-raspberry-pi-1

Things to review…XBMC

Create KODI Plugins -> https://www.youtube.com/results?search_query=create+kodi+plugin

https://www.youtube.com/watch?v=6aQ6T7RljkM

https://www.youtube.com/watch?v=_ZQQgonRiHk

See FM-Radio for possible plug-ins.

Create KODI Skin -> http://kodi.wiki/view/Skin_development

skin.CarPC-touch_carbon-master

–> https://www.google.com/search?q=kodi+%22CarPC-touch%22+skin&biw=1680&bih=925&source=lnms&sa=X&ved=0ahUKEwirl9L7-tPOAhUcS2MKHbvvCjsQ_AUIBygA&dpr=1

–> https://www.google.com/search?q=kodi+car+pc+skin&oq=kodi+car+scin&aqs=chrome.2.69i57j0l2j69i64.7648j0j4&sourceid=chrome&ie=UTF-8

–> http://arendwierks.blogspot.com/p/touchscreen-fix-raspberry-pi-xbmc-kodi.html

openCarPC

CarPC -> http://kodi.wiki/view/raspberry_Pi

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Aug 21 2016

Playing Music – mpg123

Category: Raspberry Pi — dq @ 4:52 PM

http://blog.scphillips.com/posts/2013/07/playing-music-on-a-raspberry-pi-using-upnp-and-dlna-revisited/

$ sudo apt-get install mpg123
$ cd /tmp
$ wget http://www.richardfarrar.com/audio/right.mp3
$ wget http://www.richardfarrar.com/audio/left.mp3
$ mpg123 right.mp3
$ mpg123 left.mp3

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Aug 21 2016

Espeak is a more modern speech synthesis package than Festival. It sounds clearer but does wail a little. If you are making an alien or a RPi witch then it’s the one for you! Seriously it is a good allrounder with great customisation options.

Install Espeak with:

sudo apt-get install espeak

Test Espeak with: English female voice, emphasis on capitals (-k), speaking slowly (-s) using direct text:-

 espeak -ven+f3 -k5 -s150 "I've just picked up a fault in the AE35 unit"

http://elinux.org/RPi_Text_to_Speech_(Speech_Synthesis)



http://stackoverflow.com/questions/31603555/unknown-pcm-cards-pcm-rear-pyaudio
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi

Need to comment them out in:
pi@raspberrypi:/usr/share/alsa $ sudo nano alsa.conf

http://blog.scphillips.com/posts/2013/01/sound-configuration-on-raspberry-pi-with-alsa/

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