Hi eze,
eze wrote:...I am now trying to tweak the Dac list that populates the drop down box in the GUI "settings" page. Its a big list and I would like to reduce it to just the options that use The Rpi and HiFiBerry, 384 overlays. I am not a coder but can hack around a bit. I have tried manipulating the following files but with no luck : "nano /srv/http/app/config/defaults/i2s_table.txt" and "nano /srv/http/app/templates/settings.php". Is it possible to customize this list ? Any guidance would be appreciated...
I would personally not bother with this, you only need to use it once. It now lists most of the available soundcards so that users do not need to know anything about chipsets or overlay options. But if you really need to change it, you can modify /srv/http/app/templates/settings.php (no need to change /srv/http/app/config/defaults/i2s_table.txt) with:
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nano /srv/http/app/templates/settings.php
You can delete complete lines after the one containing
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<option value="none|I²S disabled (default)"...
Up to and including the one containing:
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<option value="hifiberry-dacplus|X400 V3.0 DAC+AMP Expansion Board"...
eze wrote:...Lastly, could someone provide a simplified explanation of any software differences there may be between different selections of the same overlay ?...
After you select an audio card with 'I²S kernel modules' in the Settings UI, the overlay which is used is displayed fully in the next line. The same overlay is often used for many audio cards, we have tried to provide the best choice per card. When the same overlay is chosen by choosing the a different audio card for the same physical audio card, the software processing is
identical. You may also find that other overlays will work with your audio card, these do sometimes sound different, but there will often be limitations. For example: the hardware volume control will not work or the card will be limited to a sample rate of 192k.
janui