AFMT_CHANNEL_MAX
if (ch < 1 || ch > AFMT_CHANNEL_MAX)
if (ch < 1 || (ch + ext) > AFMT_CHANNEL_MAX)
if (*arg_i < 0 || *arg_i > AFMT_CHANNEL_MAX) {
#define UAUDIO_CHANNELS_MAX min(64, AFMT_CHANNEL_MAX)