diff --git a/main/dsp.c b/main/dsp.c
index bb41519..5322c5d 100644
--- a/main/dsp.c
+++ b/main/dsp.c
@@ -1201,6 +1201,7 @@ int ast_dsp_call_progress(struct ast_dsp *dsp, struct ast_frame *inf)
 		ast_log(LOG_WARNING, "Can't check call progress of non-voice frames\n");
 		return 0;
 	}
+/* BUGBUG need to make work with any slin rate (even if the slin format changes) */
 	if (!ast_format_cache_is_slinear(inf->subclass.format)) {
 		ast_log(LOG_WARNING, "Can only check call progress in signed-linear frames\n");
 		return 0;
@@ -1427,6 +1428,7 @@ static int ast_dsp_silence_noise_with_energy(struct ast_dsp *dsp, struct ast_fra
 		return 0;
 	}
 
+/* BUGBUG need to make work with any slin rate (even if the slin format changes) */
 	if (ast_format_cache_is_slinear(f->subclass.format)) {
 		s = f->data.ptr;
 		len = f->datalen/2;
@@ -1493,6 +1495,7 @@ struct ast_frame *ast_dsp_process(struct ast_channel *chan, struct ast_dsp *dsp,
 	odata = af->data.ptr;
 	len = af->datalen;
 	/* Make sure we have short data */
+/* BUGBUG need to make work with any slin rate (even if the slin format changes) */
 	if (ast_format_cache_is_slinear(af->subclass.format)) {
 		shortdata = af->data.ptr;
 		len = af->datalen / 2;