Manuel Skorupka

I had the same problems as you described. Have you tried the server on a linux distribution. That fixed the problems for me.

Ok that was my fault, the soundcard settings in jack-server on Ubuntu1804LTS was set to 128 Frames/Periode. When is set jack-server to 64 Frames/Periode, Block Size Out/ms on Ubuntu1804LTS is also as you expected 1.33. So everthying is fine. Sorry for that.

Hi Volker again, I´ve no chance to run a Jamulus 3.4.5git Server and client directly on Windows 10! The sound is with constant dropout scraping noises as descriped in the posts before. On Ubuntu1804LTS im able to run Jamulus64 Server and Client without those effects. I noitced a difference in the server window on the Block Size Out/ms parameter. Windows 10 it is 1.33 Ubuntu1604LTS it is 2.67

I´ve also measured the data throughput with different numbers of coded bits for up- and downstream: 35 --> 464 KBit/s 72 --> 680 KBit/s 87 --> 784 KBit/s I think that 72 is good enough. But for me I made a Jamulus Version with 35, 72 and 87 number of coded bytes. Because I will never use the low quality mode.

On the server i checked the Jamulus CPU load with htop. On the clients (Raspberry Pi 4, Raspberry Pi 3B) i checked the CPU load with htop. An my client on Win10 has 2,7% cpu load. I can´t see any big differences beween the different Jamulus versions. But i´dont know if that is an meaningful testing methode.

Hi Volker again, I also did an audio comparison between Jamulus 128 with high quality audio settings and Jamulus64 compiled with '#undef USE_LOW_COMPLEXITY_CELT_ENC on different settings. It´s all stored in a reaper project. I can´t hear a difference between the different versions of Jamulus. ;)

I´ve made some new additional measurements with the hints you gave me. '#undef USE_LOW_COMPLEXITY_CELT_ENC improves the audio quality. In this mode the increase of 72 coded bytes improves audio quality too, to the point of 88. It seems that it brings down the noise a little bit.

I tried all values from 60 to 100 and also 142, 144, 248. The quality doesn't improve significant.