rem: virtual SAMPLE_SPECS::sample_pos_t length_in_samples(void) const { return(child_repp->length_in_samples()); }
add: long AUDIO_IO_BUFFERED_PROXY::length_in_samples(void) const { return(child_repp->length_in_samples()); }
context:   virtual SAMPLE_SPECS::sample_pos_t length_in_samples(void) const { return(child_repp->length_in_samples()); }