diff --git a/include/hsdaoh_private.h b/include/hsdaoh_private.h
index e14623b..cbdccf1 100644
--- a/include/hsdaoh_private.h
+++ b/include/hsdaoh_private.h
@@ -108,6 +108,27 @@ enum
 	PIO_32BIT_IQ,
 	PIO_PCM1802_AUDIO,
 	// Placeholder for internal ADC data from pico
+	FPGA_1BIT	= 256,
+	FPGA_2BIT,
+	FPGA_3BIT,
+	FPGA_4BIT,
+	FPGA_5BIT,
+	FPGA_6BIT,
+	FPGA_7BIT,
+	FPGA_8BIT,
+	FPGA_8BIT_DUAL,
+	FPGA_8BIT_DDR,
+	FPGA_8BIT_IQ,
+	FPGA_9BIT,
+	FPGA_10BIT,
+	FPGA_10BIT_DUAL,
+	FPGA_10BIT_DDR,
+	FPGA_10BIT_IQ,
+	FPGA_11BIT,
+	FPGA_12BIT,
+	FPGA_12BIT_DUAL,
+	FPGA_12BIT_DDR,
+	FPGA_12BIT_IQ,
 };
 
 #endif
diff --git a/src/format_convert.c b/src/format_convert.c
index 7163b67..e7fd4c3 100644
--- a/src/format_convert.c
+++ b/src/format_convert.c
@@ -228,7 +228,7 @@ void hsdaoh_unpack_fpga_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_i
 {
 	uint16_t *in = (uint16_t *)data_info->buf;
 	size_t inlen = data_info->len / sizeof(uint16_t);
-	unsigned int i, j = 0;
+	unsigned int j = 0;
 	uint16_t *out16_1 = malloc(sizeof(uint16_t) * inlen * 2);
 	uint16_t *out16_2 = malloc(sizeof(uint16_t) * inlen * 2);
 
@@ -236,7 +236,7 @@ void hsdaoh_unpack_fpga_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_i
 		return;
 
 	/* extract packed 2x12 bit samples */
-	for (i = 0; i < inlen; i += 3) {
+	for (unsigned int i = 0; i < inlen; i += 3) {
 		uint16_t lsbs = in[i+2];
 		out16_1[j]   = ((in[i+0] & 0xff00) >> 4) | ((lsbs >>  0) & 0xf);
 		out16_2[j++] = ((in[i+0] & 0x00ff) << 4) | ((lsbs >>  4) & 0xf);
@@ -245,10 +245,10 @@ void hsdaoh_unpack_fpga_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_i
 	}
 
 	if (dev->output_float) {
-		hsdaoh_16bit_to_float(dev, data_info, out16_1, i, 2047.5, true);
+		hsdaoh_16bit_to_float(dev, data_info, out16_1, j, 2047.5, true);
 	} else {
 		data_info->buf = (uint8_t *)out16_1;
-		data_info->len = i * sizeof(uint16_t);
+		data_info->len = j * sizeof(uint16_t);
 
 		dev->cb(data_info);
 	}
@@ -256,10 +256,10 @@ void hsdaoh_unpack_fpga_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_i
 	data_info->stream_id += 1;
 
 	if (dev->output_float) {
-		hsdaoh_16bit_to_float(dev, data_info, out16_2, i, 2047.5, true);
+		hsdaoh_16bit_to_float(dev, data_info, out16_2, j, 2047.5, true);
 	} else {
 		data_info->buf = (uint8_t *)out16_2;
-		data_info->len = i * sizeof(uint16_t);
+		data_info->len = j * sizeof(uint16_t);
 
 		dev->cb(data_info);
 	}
diff --git a/src/libhsdaoh.c b/src/libhsdaoh.c
index 6e9016f..f54b837 100644
--- a/src/libhsdaoh.c
+++ b/src/libhsdaoh.c
@@ -72,6 +72,16 @@ enum crc_config {
 	CRC16_2_LINE		/* Line contains CRC of the line before the last line */
 };
 
+#define DEFAULT_MAX_STREAMS		8
+
+typedef struct
+{
+	uint64_t data_cnt;
+	uint32_t srate;
+	uint32_t reserved1;
+	char reserved2[16];
+} __attribute__((packed, aligned(1))) stream_info_t;
+
 typedef struct
 {
 	uint32_t magic;
@@ -80,6 +90,10 @@ typedef struct
 	uint8_t  crc_config;
 	uint16_t version;
 	uint32_t flags;
+	uint32_t reserved2[8];
+	uint16_t stream0_format;
+	uint16_t max_streamid;
+	stream_info_t stream_info[DEFAULT_MAX_STREAMS];
 } __attribute__((packed, aligned(1))) metadata_t;
 
 #define FLAG_STREAM_ID_PRESENT	(1 << 0)
@@ -552,6 +566,9 @@ void hsdaoh_output(hsdaoh_dev_t *dev, uint16_t sid, int format, uint8_t *data, s
 		case PIO_PCM1802_AUDIO:
 			hsdaoh_unpack_pio_pcm1802_audio(dev, &data_info);
 			break;
+		case FPGA_12BIT_DUAL:
+			hsdaoh_unpack_fpga_12bit_dual(dev, &data_info);
+			break;
 		default:
 			dev->cb(&data_info);
 			break;
@@ -587,7 +604,6 @@ static void *hsdaoh_output_worker(void *arg)
 		pthread_mutex_unlock(&dev->ll_mutex);
 
 		while (curelem != NULL) {
-			//	printf("got a buffer for sid %d with len %d\n", curelem->sid, bytesleft);
 			hsdaoh_output(dev, curelem->sid, curelem->format, curelem->data, curelem->len);
 
 			prev = curelem;
@@ -716,8 +732,10 @@ void hsdaoh_process_frame(hsdaoh_dev_t *dev, uint8_t *data, int size)
 
 		if (meta.flags & FLAG_STREAM_ID_PRESENT)
 			stream_id &= 0x3f;
-		else
+		else {
 			stream_id = 0;
+			format =  meta.stream0_format;
+		}
 
 		/* we only use 12 bits, the upper 4 bits are reserved for the metadata */
 		payload_len &= 0x0fff;