[chuck] no sound from sndbuf?

Hello, Just started with chuck 1.1.4.6, cygwin/win2000 and also MacOSX. I get sound fine from synth generators (larry.ck, moe.ck examples) but not from sndbuf (sndbuf.ck example). The file appears to get read, I just don't hear any output. I'm using 16/44.1 stereo wav samples from ampfea.org, e.g.

http://ampfea.org/files.php?com=i_view&type=20

sndbuf.ck --- sndbuf buf => dac; "snare.wav" => buf.read; while( true ) { 0 => buf.pos; 100::ms => now; } michael