diff --git a/src/decoder/aac_plugin.c b/src/decoder/aac_plugin.c
index d372ce5b1..19a7d7c9c 100644
--- a/src/decoder/aac_plugin.c
+++ b/src/decoder/aac_plugin.c
@@ -405,6 +405,11 @@ aac_stream_decode(struct decoder *mpd_decoder, struct input_stream *inStream)
 				.sample_rate = sample_rate,
 			};
 
+			if (!audio_format_valid(&audio_format)) {
+				g_warning("aac: invalid audio format\n");
+				break;
+			}
+
 			decoder_initialized(mpd_decoder, &audio_format,
 					    false, totalTime);
 			initialized = true;
diff --git a/src/decoder/audiofile_plugin.c b/src/decoder/audiofile_plugin.c
index 95ae37dd7..c862074b5 100644
--- a/src/decoder/audiofile_plugin.c
+++ b/src/decoder/audiofile_plugin.c
@@ -77,19 +77,20 @@ audiofile_decode(struct decoder *decoder, const char *path)
 	audio_format.channels =
 	              (uint8_t)afGetVirtualChannels(af_fp, AF_DEFAULT_TRACK);
 
+	if (!audio_format_valid(&audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  audio_format.sample_rate, audio_format.bits,
+			  audio_format.channels);
+		afCloseFile(af_fp);
+		return;
+	}
+
 	frame_count = afGetFrameCount(af_fp, AF_DEFAULT_TRACK);
 
 	total_time = ((float)frame_count / (float)audio_format.sample_rate);
 
 	bitRate = (uint16_t)(st.st_size * 8.0 / total_time / 1000.0 + 0.5);
 
-	if (audio_format.bits != 8 && audio_format.bits != 16) {
-		g_warning("Only 8 and 16-bit files are supported. %s is %i-bit\n",
-			  path, audio_format.bits);
-		afCloseFile(af_fp);
-		return;
-	}
-
 	fs = (int)afGetVirtualFrameSize(af_fp, AF_DEFAULT_TRACK, 1);
 
 	decoder_initialized(decoder, &audio_format, true, total_time);
diff --git a/src/decoder/ffmpeg_plugin.c b/src/decoder/ffmpeg_plugin.c
index 1d98f8051..f9e40e2f5 100644
--- a/src/decoder/ffmpeg_plugin.c
+++ b/src/decoder/ffmpeg_plugin.c
@@ -255,6 +255,13 @@ ffmpeg_decode_internal(struct ffmpeg_context *ctx)
 	audio_format.sample_rate = (unsigned int)codec_context->sample_rate;
 	audio_format.channels = codec_context->channels;
 
+	if (!audio_format_valid(&audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  audio_format.sample_rate, audio_format.bits,
+			  audio_format.channels);
+		return false;
+	}
+
 	//there is some problem with this on some demux (mp3 at least)
 	if (format_context->duration != (int)AV_NOPTS_VALUE) {
 		total_time = format_context->duration / AV_TIME_BASE;
diff --git a/src/decoder/flac_plugin.c b/src/decoder/flac_plugin.c
index 4767e35b0..09757f091 100644
--- a/src/decoder/flac_plugin.c
+++ b/src/decoder/flac_plugin.c
@@ -343,6 +343,14 @@ flac_decode_internal(struct decoder * decoder, struct input_stream *inStream,
 		goto fail;
 	}
 
+	if (!audio_format_valid(&data.audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  data.audio_format.sample_rate,
+			  data.audio_format.bits,
+			  data.audio_format.channels);
+		goto fail;
+	}
+
 	decoder_initialized(decoder, &data.audio_format,
 			    inStream->seekable, data.total_time);
 
diff --git a/src/decoder/mp4_plugin.c b/src/decoder/mp4_plugin.c
index f97ffe50a..67d85ba0b 100644
--- a/src/decoder/mp4_plugin.c
+++ b/src/decoder/mp4_plugin.c
@@ -275,6 +275,15 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
 			scale = frame_info.samplerate;
 #endif
 			audio_format.sample_rate = scale;
+
+			if (!audio_format_valid(&audio_format)) {
+				g_warning("Invalid audio format: %u:%u:%u\n",
+					  audio_format.sample_rate,
+					  audio_format.bits,
+					  audio_format.channels);
+				break;
+			}
+
 			decoder_initialized(mpd_decoder, &audio_format,
 					    input_stream->seekable,
 					    total_time);
diff --git a/src/decoder/mpc_plugin.c b/src/decoder/mpc_plugin.c
index 4d5f0b8b3..da49425fa 100644
--- a/src/decoder/mpc_plugin.c
+++ b/src/decoder/mpc_plugin.c
@@ -155,6 +155,14 @@ mpc_decode(struct decoder *mpd_decoder, struct input_stream *inStream)
 	audio_format.channels = info.channels;
 	audio_format.sample_rate = info.sample_freq;
 
+	if (!audio_format_valid(&audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  audio_format.sample_rate,
+			  audio_format.bits,
+			  audio_format.channels);
+		return;
+	}
+
 	replayGainInfo = replay_gain_info_new();
 	replayGainInfo->tuples[REPLAY_GAIN_ALBUM].gain = info.gain_album * 0.01;
 	replayGainInfo->tuples[REPLAY_GAIN_ALBUM].peak = info.peak_album / 32767.0;
diff --git a/src/decoder/oggflac_plugin.c b/src/decoder/oggflac_plugin.c
index 637a611a3..782cd361b 100644
--- a/src/decoder/oggflac_plugin.c
+++ b/src/decoder/oggflac_plugin.c
@@ -294,6 +294,14 @@ oggflac_decode(struct decoder * mpd_decoder, struct input_stream *inStream)
 		goto fail;
 	}
 
+	if (!audio_format_valid(&data.audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  data.audio_format.sample_rate,
+			  data.audio_format.bits,
+			  data.audio_format.channels);
+		goto fail;
+	}
+
 	decoder_initialized(mpd_decoder, &data.audio_format,
 			    inStream->seekable, data.total_time);
 
diff --git a/src/decoder/oggvorbis_plugin.c b/src/decoder/oggvorbis_plugin.c
index 539a8e092..3a5614fd0 100644
--- a/src/decoder/oggvorbis_plugin.c
+++ b/src/decoder/oggvorbis_plugin.c
@@ -288,6 +288,15 @@ oggvorbis_decode(struct decoder *decoder, struct input_stream *inStream)
 
 			audio_format.channels = vi->channels;
 			audio_format.sample_rate = vi->rate;
+
+			if (!audio_format_valid(&audio_format)) {
+				g_warning("Invalid audio format: %u:%u:%u\n",
+					  audio_format.sample_rate,
+					  audio_format.bits,
+					  audio_format.channels);
+				break;
+			}
+
 			if (!initialized) {
 				float total_time = ov_time_total(&vf, -1);
 				if (total_time < 0)
diff --git a/src/decoder/wavpack_plugin.c b/src/decoder/wavpack_plugin.c
index 377174e51..2dcc35102 100644
--- a/src/decoder/wavpack_plugin.c
+++ b/src/decoder/wavpack_plugin.c
@@ -148,6 +148,14 @@ wavpack_decode(struct decoder *decoder, WavpackContext *wpc, bool can_seek,
 		audio_format.bits = 24;
 	}
 
+	if (!audio_format_valid(&audio_format)) {
+		g_warning("Invalid audio format: %u:%u:%u\n",
+			  audio_format.sample_rate,
+			  audio_format.bits,
+			  audio_format.channels);
+		return;
+	}
+
 	if ((WavpackGetMode(wpc) & MODE_FLOAT) == MODE_FLOAT) {
 		format_samples = format_samples_float;
 	} else {
diff --git a/src/decoder_api.c b/src/decoder_api.c
index a85a52e71..fd3990786 100644
--- a/src/decoder_api.c
+++ b/src/decoder_api.c
@@ -40,6 +40,7 @@ void decoder_initialized(struct decoder * decoder,
 	assert(!decoder->seeking);
 	assert(audio_format != NULL);
 	assert(audio_format_defined(audio_format));
+	assert(audio_format_valid(audio_format));
 
 	pcm_convert_init(&decoder->conv_state);