diff --git a/modules/fvad/fvad.c b/modules/fvad/fvad.c
index 0e273e3..70131e1 100644
--- a/modules/fvad/fvad.c
+++ b/modules/fvad/fvad.c
@@ -81,20 +81,11 @@ static bool find_call(const struct call *call, void *arg)
 	return call_audio(call) == fa->audio;
 }
 
-
-static int encode_update(struct aufilt_enc_st **stp, void **ctx,
-			 const struct aufilt *af, struct aufilt_prm *prm,
-			 const struct audio *au)
+static int check_fvad_params(const struct aufilt_prm *prm)
 {
-	struct vad_enc *st;
-	(void)ctx;
-
-	if (!stp || !af || !prm)
+	if (!prm)
 		return EINVAL;
 
-	if (*stp)
-		return 0;
-
 	if (prm->ch != 1) {
 		warning("fvad: only mono is supported\n");
 		return EINVAL;
@@ -106,24 +97,67 @@ static int encode_update(struct aufilt_enc_st **stp, void **ctx,
 		return EINVAL;
 	}
 
-	st = mem_zalloc(sizeof(*st), enc_destructor);
-	if (!st)
-		return ENOMEM;
+	return 0;
+}
 
-	st->fvad = fvad_new();
-	if (!st->fvad) {
-		mem_deref(st);
+static int init_fvad(Fvad **fvad, const struct aufilt_prm *prm)
+{
+	struct conf *conf = conf_cur();
+
+	if (!fvad || !prm)
+		return EINVAL;
+
+	*fvad = fvad_new();
+	if (!*fvad) {
 		return ENOMEM;
 	}
 
-	int err = fvad_set_sample_rate(st->fvad, prm->srate);
+	int err = fvad_set_sample_rate(*fvad, prm->srate);
 	if (err < 0) {
 		warning("fvad: sample rate %d is not supported\n",
 			prm->srate);
-		mem_deref(st);
 		return EINVAL;
 	}
 
+	uint32_t mode = 0;
+	conf_get_u32(conf, "fvad_mode", &mode);
+	err = fvad_set_mode(*fvad, mode);
+	if (err < 0) {
+		warning("fvad: mode %d is not supported\n",
+			mode);
+		return EINVAL;
+	}
+
+	return 0;
+}
+
+static int encode_update(struct aufilt_enc_st **stp, void **ctx,
+			 const struct aufilt *af, struct aufilt_prm *prm,
+			 const struct audio *au)
+{
+	struct vad_enc *st;
+	(void)ctx;
+
+	if (!stp || !af || !prm)
+		return EINVAL;
+
+	if (*stp)
+		return 0;
+
+	int err = check_fvad_params(prm);
+	if (err)
+		return err;
+
+	st = mem_zalloc(sizeof(*st), enc_destructor);
+	if (!st)
+		return ENOMEM;
+
+	err = init_fvad(&st->fvad, prm);
+	if (err) {
+		mem_deref(st);
+		return err;
+	}
+
 	if (!st->call) {
 		struct filter_arg fa = { au, NULL };
 
@@ -149,33 +183,18 @@ static int decode_update(struct aufilt_dec_st **stp, void **ctx,
 	if (*stp)
 		return 0;
 
-	if (prm->ch != 1) {
-		warning("fvad: only mono is supported\n");
-		return EINVAL;
-	}
-
-	if (prm->fmt != AUFMT_S16LE) {
-		warning("fvad: only AUFMT_S16LE is supported. "
-			"Use the auconv module to fix this\n");
-		return EINVAL;
-	}
+	int err = check_fvad_params(prm);
+	if (err)
+		return err;
 
 	st = mem_zalloc(sizeof(*st), dec_destructor);
 	if (!st)
 		return ENOMEM;
 
-	st->fvad = fvad_new();
-	if (!st->fvad) {
+	err = init_fvad(&st->fvad, prm);
+	if (err) {
 		mem_deref(st);
-		return ENOMEM;
-	}
-
-	int err = fvad_set_sample_rate(st->fvad, prm->srate);
-	if (err < 0) {
-		warning("fvad: sample rate %d is not supported\n",
-			prm->srate);
-		mem_deref(st);
-		return EINVAL;
+		return err;
 	}
 
 	if (!st->call) {