If you hear regular pauses in output you receive, or the
person you're talking to reports the same in audio you send,
the most likely causes are:
Your network connection isn't fast enough to send real-time
audio with the compression modes
you've chosen. Try additional compression to reduce the volume
of data you're sending
The compression mode you've
selected (usually GSM, LPC, CELP, or LPC-10) requires more
computation than your computer or the computer of the person
you're talking to) can perform in real time. Choose a less
efficient but faster form of compression. The performance benchmark can help
determine which compression modes are within the computing
power of your machine.
You've chosen encryption mode(s) which require more
computation than your computer can do in real time. Use fewer
or less computationally intense modes of encryption. DES is the slowest form of
encryption, IDEA (also used by PGP key exchange) is intermediate in
speed. Key file encryption
requires virtually no computation. If you've selected multiple
encryption modes, the computation required is the sum of each
of the individual modes. Note that DES encryption is much more
time consuming in RTP and VAT
protocols. The performance
benchmark can help determine which encryption modes are
within the computing power of your machine.
Your machine may be sufficiently slow that the mechanism
Speak Freely uses to guard against system hangs due to overload
is itself creating delays which cause packets to be lost. You
can disable the system hang protection with the Options / Workarounds / Network/ Disable
Message Loop Insurance menu item, but it's unwise to do
this before you're absolutely sure the compression and
encryption modes you're using don't overload your computer.
You can experiment with various compression and encryption
modes without disturbing other users by connecting to one of
the Speak Freelyecho servers.