|
From: | Maciej Morycinski |
Subject: | Re: [Linphone-users] - Linphone for music lessons |
Date: | Wed, 16 Dec 2020 16:58:46 -0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
Dear Ms. Cortelli,
Your idea is wonderful, and maybe some company already created a product that would suit your needs exactly. It would certainly make sense to research that in professional music circles.
However, when it comes to using a SIP phone such as Linphone, it is probably the wrong tool for this particular job.
Issue #1 is with the
codec. Despite your impression re Zoom, it is not possible at
all to transfer sound across the Internet without using _some_
codec. Zoom certainly uses a default one.
If it is possible to select Opus Wide using Zoom, that might
work for you. There are various codecs appropriate for different
tasks, but most of them are unsuitable for music, as many are
specifically
meant for speech only. Opus Wide is one of few exceptions.
This brings me to Issue
#2: if the student is using a telephone, or Linphone, or
anything that has a phone number assigned, then their telephone
service provider could be only
allowing certain codecs. The codec that ends up being used is
negotiated between your phone and your service provider, as well
as between the student's phone, and their service provider,
and one of the codecs available on both ends is selected. So to
make sure it works, both you and the student would have to have
ONLY Opus Wide allowed in Linphone, and both service
providers would have to allow it on their system. Otherwise
there would be translation, and sound quality would be lost.
Your student would need
to have a high speed, low latency internet connection. If the
connection is over a cellular network, then anything slower than
LTE will not work properly,
due to high latency. If you use not only sound, but video as
well, then the demands on the network throughput would be much
higher than for sound only.
Bottom line is that I
think using VOIP for music lessons MAY be possible using Zoom,
but if Opus Wide is not available, a SIP system (Linphone + two
service providers) will likely not work
to your satisfaction. It is still worth trying, but for business
reasons, I would not see it as a commercially viable system.
If I had proper
resources and a company, I would create custom software based on
something like Network Audio System (NAS) but since I know
nothing about it, I will leave it at that.
Maciej Morycinski
#204-5100 Capitol Dr
Burnaby, BC, Canada, V5B 4S7
+1-778-820-0182
morciej@gmail.com
Hello,
I'm new to Linphone and would like to use it for music lessons, where audio quality is very important.
[...]
_______________________________________________
Linphone-users mailing list
Linphone-users@nongnu.org
https://lists.nongnu.org/mailman/listinfo/linphone-users
[Prev in Thread] | Current Thread | [Next in Thread] |