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Peppy player
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Old 21st September 2019, 06:37 PM   #51
johnyradio is offline johnyradio  United States
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Join Date: Sep 2011
Quote:
Originally Posted by rpi View Post
- Implemented Equalizer UI.
Equalizer UI * project-owner/Peppy.doc Wiki * GitHub
Equalizer functionality was based on ALSA Equalizer
plugin. UI has five pre-defined frequency profiles for such music genres as Classical,
Jazz, Pop, Rock, Contemporary. Here is the screenshot showing Equalizer UI:

Click the image to open in full size.
Can equalizer be installed on Linux as a standalone app, without any of the other software, and without the hardware?

thx
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Old 21st September 2019, 08:07 PM   #52
rpi is offline rpi  United States
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Join Date: Apr 2015
Location: San Francisco
Peppy player is using Alsaequal ALSA plugin. I believe it can be installed on any Linux distribution. I used the following command to install it on Raspbian OS using apt-get package manager:
Code:
sudo apt-get install -y libasound2-plugin-equal
You can use a package manager specific for your Linux distribution.

Then you need to add Equalizer plugin to your ALSA audio chain in file .asoundrc located in your user folder. Here is the example of that file:
Peppy.doc/.asoundrc-equal at master * project-owner/Peppy.doc * GitHub

The type of plugin is 'equal'.

When all that done you can set different bands from command line. The following page describes the whole process:
Adding equalization using alsaeq | HiFiBerry

And here is the player code snippet for setting equalizer band values:
Peppy/util.py at 5ed7747c5864bf7516f713cd50fdc3ff1a3f0f73 * project-owner/Peppy * GitHub
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Old 21st September 2019, 08:19 PM   #53
johnyradio is offline johnyradio  United States
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Join Date: Sep 2011
Thx @rpi. I've already got alsaequal running on my arch.

But the eq is a terminal gui. I'd like to get the peppy EQ GUI. That's the only part of peppy I want, actually.

Click the image to open in full size.
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Old 21st September 2019, 08:26 PM   #54
rpi is offline rpi  United States
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Join Date: Apr 2015
Location: San Francisco
It's a part of the player right now. If you have Python programming skills you can make it as a stand-alone app. I did that for VU-Meter. Originally it was also the part of the player then I created stand-alone app.
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Old 21st September 2019, 08:30 PM   #55
johnyradio is offline johnyradio  United States
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Join Date: Sep 2011
unfortunately, i don't program python. thx tho'

There's the alsamixergui, but it doesn't seem to persist L-R locking on the EQ bands, when you re-open it. That's an inconvenience. And not as pretty as yours
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