audio-4-channel-mic-96kHz

[MaximilianArlt]

Operating System

Windows 11

Board

STM32F7

Firmware

examples/device/audio-4-channel-mic

What happened ?

If I increase the sample rate to 96000 in the config.h, I don't get proper values, only something like noise. What could be the cause of this?

How to reproduce ?

/

Debug Log as txt file (LOG/CFG_TUSB_DEBUG=2)

/

Screenshots

No response

I have checked existing issues, dicussion and documentation

• I confirm I have checked existing issues, dicussion and documentation.

[HiFiPhile]

Please do not use bug report for usage helping.

Also please provide more information.

[MaximilianArlt]

Okay, sry

I only used the 4-channel audio example and changed the sample rate from 48kHz to 96kHz in the config.h file; everything else remained the same as in the example. I only get noise. I even have noise now when I go back to 48kHz. In the config.h file, I also configured it as High-Speed, and nothing else.

[HiFiPhile]

Which board are you using ? Does it really support high-speed mode ?

[MaximilianArlt]

I use STM32F723e DISCOVERY Board and it support high-speed.

[HiFiPhile]

Something is wrong on your end, also tested with STM32723E-DISCO:

E:\mcu\tinyusb>git diff
diff --git a/examples/device/audio_4_channel_mic/src/plot_audio_samples.py b/examples/device/audio_4_channel_mic/src/plot_audio_samples.py
index d17a908b6..514a46777 100644
--- a/examples/device/audio_4_channel_mic/src/plot_audio_samples.py
+++ b/examples/device/audio_4_channel_mic/src/plot_audio_samples.py
@@ -9,7 +9,7 @@ if __name__ == '__main__':
     # differently from tested list below. Uncomment the next line to see full list and try to pick correct one
     # print(sd.query_devices())

-    fs = 48000                 # Sample rate
+    fs = 96000                 # Sample rate
     duration = 1   # Duration of recording

     if platform.system() == 'Windows':
diff --git a/examples/device/audio_4_channel_mic/src/tusb_config.h b/examples/device/audio_4_channel_mic/src/tusb_config.h
index 46484f847..c5d87521e 100644
--- a/examples/device/audio_4_channel_mic/src/tusb_config.h
+++ b/examples/device/audio_4_channel_mic/src/tusb_config.h
@@ -103,7 +103,7 @@ extern "C" {
 //--------------------------------------------------------------------

 // Have a look into audio_device.h for all configurations
-#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE              48000
+#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE              96000

 #define CFG_TUD_AUDIO_FUNC_1_DESC_LEN                 TUD_AUDIO_MIC_FOUR_CH_DESC_LEN

[MaximilianArlt]

Okay, thank you. This is my "config.h" file, do you see anything wrong with that?

#ifndef TUSB_CONFIG_H
#define TUSB_CONFIG_H

#ifdef __cplusplus
extern "C" {
#endif

//--------------------------------------------------------------------+
// Board Specific Configuration
//--------------------------------------------------------------------+
#define CFG_TUSB_MCU OPT_MCU_STM32F7
#define CFG_TUSB_OS 1
#define BOARD_DEVICE_RHPORT_SPEED OPT_MODE_HIGH_SPEED // 480mbps
#define BOARD_DEVICE_RHPORT_NUM 1
#define CFG_TUSB_RHPORT1_MODE (OPT_MODE_DEVICE | OPT_MODE_HIGH_SPEED)
#define BOARD_TUD_RHPORT 1
#define BOARD_TUD_MAX_SPEED OPT_MODE_HIGH_SPEED
//#define TUP_USBIP_FSDEV

// RHPort number used for device can be defined by board.mk, default to port 0
#ifndef BOARD_TUD_RHPORT
#define BOARD_TUD_RHPORT 0
#endif

// RHPort max operational speed can defined by board.mk
#ifndef BOARD_TUD_MAX_SPEED
#define BOARD_TUD_MAX_SPEED OPT_MODE_DEFAULT_SPEED
#endif

//--------------------------------------------------------------------
// COMMON CONFIGURATION
//--------------------------------------------------------------------

// defined by compiler flags for flexibility
#ifndef CFG_TUSB_MCU
#error CFG_TUSB_MCU must be defined
#endif

#ifndef CFG_TUSB_OS
#define CFG_TUSB_OS OPT_OS_NONE
#endif

#ifndef CFG_TUSB_DEBUG
#define CFG_TUSB_DEBUG 0
#endif

// Enable Device stack
#define CFG_TUD_ENABLED 1

// Default is max speed that hardware controller could support with on-chip PHY
#define CFG_TUD_MAX_SPEED BOARD_TUD_MAX_SPEED

/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.

• Tinyusb use follows macros to declare transferring memory so that they can be put
• into those specific section.
• e.g
• • CFG_TUSB_MEM SECTION : attribute (( section(".usb_ram") ))
• • CFG_TUSB_MEM_ALIGN : attribute ((aligned(4)))
    */
    #ifndef CFG_TUSB_MEM_SECTION
    #define CFG_TUSB_MEM_SECTION
    #endif

#ifndef CFG_TUSB_MEM_ALIGN
#define CFG_TUSB_MEM_ALIGN attribute ((aligned(4)))
#endif

//--------------------------------------------------------------------
// DEVICE CONFIGURATION
//--------------------------------------------------------------------

#ifndef CFG_TUD_ENDPOINT0_SIZE
#define CFG_TUD_ENDPOINT0_SIZE 64
#endif

//------------- CLASS -------------//
#define CFG_TUD_AUDIO 1
#define CFG_TUD_CDC 0
#define CFG_TUD_MSC 0
#define CFG_TUD_HID 0
#define CFG_TUD_MIDI 0
#define CFG_TUD_VENDOR 0

//--------------------------------------------------------------------
// AUDIO CLASS DRIVER CONFIGURATION
//--------------------------------------------------------------------

// Have a look into audio_device.h for all configurations
#define CFG_TUD_AUDIO_ENABLE_INTERRUPT_EP 1
#define CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE 96000

#define CFG_TUD_AUDIO_FUNC_1_DESC_LEN TUD_AUDIO_MIC_FOUR_CH_DESC_LEN

#define CFG_TUD_AUDIO_FUNC_1_N_AS_INT 1
#define CFG_TUD_AUDIO_FUNC_1_CTRL_BUF_SZ 64

#define CFG_TUD_AUDIO_ENABLE_EP_IN 1
#define CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX 2 // This value is not required by the driver, it parses this information from the descriptor once the alternate interface is set by the host - we use it for the setup
#define CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX 4 // This value is not required by the driver, it parses this information from the descriptor once the alternate interface is set by the host - we use it for the setup
#define CFG_TUD_AUDIO_EP_SZ_IN TUD_AUDIO_EP_SIZE(CFG_TUD_AUDIO_FUNC_1_SAMPLE_RATE, CFG_TUD_AUDIO_FUNC_1_N_BYTES_PER_SAMPLE_TX, CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX)

#define CFG_TUD_AUDIO_ENABLE_ENCODING 0
#define CFG_TUD_AUDIO_EP_IN_FLOW_CONTROL 1

#if CFG_TUD_AUDIO_ENABLE_ENCODING

#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX CFG_TUD_AUDIO_EP_SZ_IN
#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ CFG_TUD_AUDIO_EP_SZ_IN

#define CFG_TUD_AUDIO_ENABLE_TYPE_I_ENCODING 1
#define CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX 2 // One I2S stream contains two channels, each stream is saved within one support FIFO - this value is currently fixed, the driver does not support a changing value
#define CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO (CFG_TUD_AUDIO_FUNC_1_N_CHANNELS_TX / CFG_TUD_AUDIO_FUNC_1_CHANNEL_PER_FIFO_TX)
#define CFG_TUD_AUDIO_FUNC_1_TX_SUPP_SW_FIFO_SZ (TUD_OPT_HIGH_SPEED ? 64 : 8) * (CFG_TUD_AUDIO_EP_SZ_IN / CFG_TUD_AUDIO_FUNC_1_N_TX_SUPP_SW_FIFO) // Example write FIFO every 1ms, so it should be 8 times larger for HS device

#else

#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SZ_MAX CFG_TUD_AUDIO_EP_SZ_IN
#define CFG_TUD_AUDIO_FUNC_1_EP_IN_SW_BUF_SZ 32*CFG_TUD_AUDIO_EP_SZ_IN // Example write FIFO every 1ms, so it should be 8 times larger for HS device

#endif

#ifdef __cplusplus
}
#endif

#endif /* TUSB_CONFIG_H */