new user: no audio from speakers

[Richard Dobson]

Hello,

I am trying to get into my new B4, and have an immediate audio challenge:

before updating the firmwave there was no sound out at all.

After updating, I got the startup jingle from the speakers (good) but 
still no sound from tamtam (bad).

After tinkering with "amixer", turning on just about everything that is 
an output, I now get good audio from the headphone socket, but still 
nothing goes to the speaker (apart from the aforesaid bootup jingle, 
which at least shows the speakers are working in principle).

It would not surprise me if there is not some well-known trick to waking 
up the speakers, but I have not so far found it. Can anyone advise? I 
can't really demonstrate the machine at Bath Spa Uni without sounds from 
the speakers!


On a related question:

I cannot set real-time output when running csound from the console using 
-o devaudio: gives error "unknown rtaudio module: 'PortAudio' ". 
Surprised this is not already installed with Csound.  I have set 
OPCODEDIR to /usr/lib/csound/plugins. Do I have to install portaudio 
separately? from where?

Richard Dobson