Page 1 of 1

Audio Transcoding in integer ratios

PostPosted: Wed Nov 05, 2014 4:06 pm
by jacobacci
Hi all,
I am new to this forum and I was wondering if serviio is able to do the following. I have high resolution FLAC files (different samplerates up to 192kHz) that I want to play on several upnp clients (Axis Revo, sonoro etc.). These clients support different sampling rates, some up to 16bit/48kHz some up to 24bit/96kHz.
I would like to be able to setup a transcoding profile for each device that defines how the high resolution files get downsampled before streaming then to the device. For example

source rate target rate
24bit/192kHz 16bit/48kHz
24bit/176.4kHz 16bit/44.1kHz
24bit/96kHz 16bit/48kHz
24bit/88.2kHz 16bit/48kHz
24bit/48kHz 16bit/48kHz
16bit/48kHz no transcoding
16bit/44.1kHz no transcoding
etc.

I would like to use integer ratio transcoding as it uses simpler filters and minimizes processor load and results in a better audio quality (if the same processor power is used).
Is serviio able to recognize the different devices and then execute a device dependent transcoding profile in this way?
Thanks a lot and best regards

Re: Audio Transcoding in integer ratios

PostPosted: Wed Nov 05, 2014 7:20 pm
by Illico
jacobacci wrote:Is serviio able to recognize the different devices and then execute a device dependent transcoding profile in this way?
Thanks a lot and best regards

Read : http://www.serviio.org/index.php?option ... icle&id=24

Serviio is able to recognize Upnp/DLNA devices according to there "UPnP FriendlyName" or "HTTP header" value.
You can create profiles for each devices.
Per profiles, you can set different audio target settings : aBitrate (audio bitrate), aSamplerate (audio sample rate), forceStereo .

Re: Audio Transcoding in integer ratios

PostPosted: Thu Nov 06, 2014 11:17 am
by jacobacci
Thanks Illico, that's helpful
Got Serviio installed successfully on my Synology DS411+ii. Console as well on the PC.
Now I would like to edit profiles.xml
What is the full path to profiles.xml on the Synology?

Re: Audio Transcoding in integer ratios

PostPosted: Thu Nov 06, 2014 3:16 pm
by Illico
jacobacci wrote:What is the full path to profiles.xml on the Synology?

I don't know for Synology...<pc5dczc_install_path>/config/profiles.xml

Re: Audio Transcoding in integer ratios

PostPosted: Sat Nov 08, 2014 8:07 am
by jacobacci
found it. Second post of this thread
http://forum.serviio.org/viewtopic.php?f=14&t=4556