diff --git a/sys/arch/vax/vsa/vsaudio.c b/sys/arch/vax/vsa/vsaudio.c
index a856c4fa31b0..9a2d3b6f939a 100644
--- a/sys/arch/vax/vsa/vsaudio.c
+++ b/sys/arch/vax/vsa/vsaudio.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: vsaudio.c,v 1.4.2.2 2019/05/04 07:20:08 isaki Exp $	*/
+/*	$NetBSD: vsaudio.c,v 1.4.2.3 2019/05/08 11:56:09 isaki Exp $	*/
 /*	$OpenBSD: vsaudio.c,v 1.4 2013/05/15 21:21:11 ratchov Exp $	*/
 
 /*
@@ -516,57 +516,4 @@ vsaudio_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread)
 	*thread = &sc->sc_lock;
 }
 
-/*
-static stream_filter_t *
-vsaudio_input_conv(struct audio_softc *sc, const audio_params_t *from,
-		const audio_params_t *to)
-{
-	return auconv_nocontext_filter_factory(vsaudio_input_conv_fetch_to);
-}
-
-static int
-vsaudio_input_conv_fetch_to(struct audio_softc *sc, stream_fetcher_t *self,
-		audio_stream_t *dst, int max_used)
-{
-	stream_filter_t *this;
-	int m, err;
-
-	this = (stream_filter_t *)self;
-	if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used * 4)))
-		return err;
-	m = dst->end - dst->start;
-	m = uimin(m, max_used);
-	FILTER_LOOP_PROLOGUE(this->src, 4, dst, 1, m) {
-		*d = ((*(const uint32_t *)s) >> 16) & 0xff;
-	} FILTER_LOOP_EPILOGUE(this->src, dst);
-	return 0;
-}
-
-static stream_filter_t *
-vsaudio_output_conv(struct audio_softc *sc, const audio_params_t *from,
-		const audio_params_t *to)
-{
-	return auconv_nocontext_filter_factory(vsaudio_output_conv_fetch_to);
-}
-
-static int
-vsaudio_output_conv_fetch_to(struct audio_softc *sc, stream_fetcher_t *self,
-		audio_stream_t *dst, int max_used)
-{
-	stream_filter_t *this;
-	int m, err;
-
-	this = (stream_filter_t *)self;
-	max_used = (max_used + 3) & ~3;
-	if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used / 4)))
-		return err;
-	m = (dst->end - dst->start) & ~3;
-	m = uimin(m, max_used);
-	FILTER_LOOP_PROLOGUE(this->src, 1, dst, 4, m) {
-		*(uint32_t *)d = (*s << 16);
-	} FILTER_LOOP_EPILOGUE(this->src, dst);
-	return 0;
-}
-*/
-
 #endif /* NAUDIO > 0 */