Search found 22 matches

by wh7qq
Sun Jan 27, 2019 6:46 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Getting the audio injector working with Buildroot embedded!
Replies: 5
Views: 3850

Re: Getting the audio injector working with Buildroot embedded!

I managed to build a functional image...boots to a command prompt and does some commands...but now I am all dressed up with no place to go...how to find/install applications? I recommend using copy/paste on the commands...memory or finger failures lead to build errors. For anyone contemplating this,...
by wh7qq
Sun Jan 20, 2019 5:30 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Setup on Ubuntu-Mate
Replies: 2
Views: 227

Setup on Ubuntu-Mate

I have been seriously frustrated by the LMDE desktop screensaver which insists on blanking the display and stopping Audacity in its tracks every 10 minutes or so. I am trying to copy a cassette tape to a .wav file and the tape is 45 minutes on a side. Having to continually keep the screen alive is a...
by wh7qq
Mon Jan 14, 2019 7:18 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: can't set up stereo soundcard
Replies: 1
Views: 733

Re: can't set up stereo soundcard

"audioinjector-setup.sh " is not a command but is the filename of a script. To use it in Linux, you must make it executable and either use sudo to call it or change its permissions. The quick and dirty approach is: sudo ./audioinjector-setup.sh. The "./" tells linux to run the script as a command. S...
by wh7qq
Mon Jan 14, 2019 7:09 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Recording with 16kHz sampling rate
Replies: 8
Views: 1016

Re: Recording with 16kHz sampling rate

The sampling rate is set by the "arecord" command. See https://linux.die.net/man/1/arecord. I don't use "Jack" so no comment on that interaction.
by wh7qq
Mon Jan 14, 2019 7:01 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: What's the go with the RCA input?
Replies: 1
Views: 850

Re: What's the go with the RCA input?

If you can play through the headphone jack, the input is clearly working. Your problem may be with the output jacks which must go to an auxiliary input on a receiver or amplifier or a separate amplifier. You will not be able to drive a speaker from the output of the AudioInjector. The board does not...
by wh7qq
Mon Jan 14, 2019 6:53 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Noise
Replies: 1
Views: 380

Re: Noise

It should be as simple as connecting a multimeter on the ohm setting to the input shield connector and to ground. It should show zero ohms. You can check the output of your guitar amp by simply reversing the leads, L<>R, on the soundcard input connectors, or connecting to an auxiliary input on a ste...
by wh7qq
Mon Jan 14, 2019 6:36 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Basic questions about the zero
Replies: 1
Views: 316

Re: Basic questions about the zero

Hey there, I have very basic questions, as I can't seem to find documentation about specs of the Zero raspberry pi soundcard. - How many input channels are there? - What is the sampling rate of the input channel(s)? - What is the bitrate? - What are the noise floor and dynamic range of the input? -...
by wh7qq
Mon Jan 14, 2019 6:28 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Compatibility Question
Replies: 1
Views: 501

Re: Compatibility Question

Reply to old, unanswered post:

1. Probably not...W$ IoT probably does not incorporate the required drivers.
2. Yes, there are several threads on this forum showing the hookup but it does require a soldering pen and solder.

See viewtopic.php?f=5&t=3084&start=10
by wh7qq
Mon Jan 14, 2019 6:22 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: How can I output a simple sine wave?
Replies: 1
Views: 310

Re: How can I output a simple sine wave?

The software package "Audacity" has the ability to generate a sound wave of a desired audio frequency and save it to a file. Generate>Tone will get you there from the Audacity top menu.
by wh7qq
Mon Jan 14, 2019 6:01 am
Forum: Discussion and pointers
Topic: RIAA preamps matching to cartridge
Replies: 0
Views: 438

RIAA preamps matching to cartridge

Rather than tack on to an old thread, the last posting on the thread of last year, http://forum.audioinjector.net/viewtopic.php?f=10&t=3166#p6838 made a reference to a guess and by golly effort to match his preamp schematic to the loading characteristics of the cartridge in use. Many of the better c...