[Loopdub-devel] Sample Rate Configuration

[Nick T. <nh...@gm...>]

The attached patch adds two new configuration parameters to
.loopdub.conf: HardwareSampleRate and InternalSampleRate.
HardwareSampleRate is the sample rate used for the audio output; it
corresponds to Player::m_nHwSampleRate. InternalSampleRate is the
sample rate used for internal processing; it corresponds to the new
static variable Player::m_nSampleRate, which replaces the old
SAMPLE_RATE constant defined in player.h.

The motivation for HardwareSampleRate is to allow the user to choose a
sample rate other than 48000Hz, which was previously hard-coded. The
motivation for InternalSampleRate is to allow the user to configure
LoopDub to choose a sample rate that matches their hardware sample
rate; or, alternately, one that matches the sample rate of their loop
files, if these two sample rates do not match.

It is arguable that InternalSampleRate and HardwareSampleRate should
be merged; that is, that they should always be the same. The advantage
would be increased simplicity (both in the code and from the user's
perspective); the disadvantage would be decreased flexibility. What do
you think?