Problems playing a .wav file over I2S

[Protonerd]

When playing a .wav file from an SD card, only noise is coming over the I2S module . My setup: Adafruit Huzzah 32 (no PSRAM!) MAX98357A SD breakout

The communication with the SD works fine, the content is dumped and according to the serial monitor the .wav file is read in. The I2S connection is also proven to be working, as using the internet radio I can receive a clear audio. I tried different .wav file, now I'm using the one coming with the library. All have the same issue.

I'm using the latest update.

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0018,len:4 load:0x3fff001c,len:1044 load:0x40078000,len:10124 load:0x40080400,len:5856 entry 0x400806a8 /System Volume Information /test.wav /320k_test.mp3 /myPlaylist.m3u /Pink-Panther.wav [D][WiFiGeneric.cpp:374] _eventCallback(): Event: 0 - WIFI_READY [D][WiFiGeneric.cpp:374] _eventCallback(): Event: 2 - STA_START [I][WiFiMulti.cpp:84] addAP(): [WIFI][APlistAdd] add SSID: csaladWIFI 7490 [D][WiFiGeneric.cpp:374] _eventCallback(): Event: 1 - SCAN_DONE [I][WiFiMulti.cpp:114] run(): [WIFI] scan done [I][WiFiMulti.cpp:119] run(): [WIFI] 4 networks found [D][WiFiMulti.cpp:149] run(): ---> 0: [11][7C:FF:4D:91:BC:F0] csaladWIFI 7490 (-63) [D][WiFiMulti.cpp:149] run(): ---> 1: [11][DC:39:6F:A7:5D:9B] csaladWIFI 7490 (-74) [D][WiFiMulti.cpp:149] run(): ---> 2: [11][DC:39:6F:A7:7E:E9] csaladWIFI 7490 (-75) [D][WiFiMulti.cpp:149] run(): ---> 3: [11][2C:91:AB:16:8B:EE] csaladWIFI 7490 (-93) [I][WiFiMulti.cpp:160] run(): [WIFI] Connecting BSSID: 7C:FF:4D:91:BC:F0 SSID: csaladWIFI 7490 Channel: 11 (-63) [D][WiFiGeneric.cpp:374] _eventCallback(): Event: 4 - STA_CONNECTED [D][WiFiGeneric.cpp:374] _eventCallback(): Event: 7 - STA_GOT_IP [D][WiFiGeneric.cpp:419] _eventCallback(): STA IP: 192.168.178.40, MASK: 255.255.255.0, GW: 192.168.178.1 [I][WiFiMulti.cpp:174] run(): [WIFI] Connecting done. [D][WiFiMulti.cpp:175] run(): [WIFI] SSID: csaladWIFI 7490 [D][WiFiMulti.cpp:176] run(): [WIFI] IP: 192.168.178.40 [D][WiFiMulti.cpp:177] run(): [WIFI] MAC: 7C:FF:4D:91:BC:F0 [D][WiFiMulti.cpp:178] run(): [WIFI] Channel: 11 [D][ESP32_Audio_I2S.ino:61] setup(): Total heap: 344116 [D][ESP32_Audio_I2S.ino:62] setup(): Free heap: 203996 [D][ESP32_Audio_I2S.ino:63] setup(): Total PSRAM: 0 [D][ESP32_Audio_I2S.ino:64] setup(): Free PSRAM: 0 info PSRAM not found, inputBufferSize: 6399 bytes [V][ssl_client.cpp:265] stop_ssl_socket(): Cleaning SSL connection. info buffers freed, free Heap: 195780 bytes info Reading file: "/test.wav" info file has no RIFF tag info stream ready info syncword found at pos 0 info Channels: 2 info SampleRate: 16000 info BitsPerSample: 16 info BitRate: N/A info Closing audio file info End of file "/test.wav" eof_mp3 /test.wav

[schreibfaul1]

This is most definitely a problem at the I2S output. Either a wire is not connected, has been mixed up or the SCK of the DAC is not connected to ground

[Protonerd]

I assumed that the wiring was right as using the WiFi to connect to a radio station works OK (I use your example where I can select between internet radio and .wav playback), with clear sound. Both the Huzzah32 and the MAX98357A have a soldered supply and GND connection because I know from experience that generating sounds with higher volume settings can consume power. For the same reason besides the USB connection (for powering and upload) I have a fully loaded Li-Ion battery connected.

[Protonerd]

I downloaded the newest version assuming that some of the recent updates might have something to do with the problem I face (especially the ones related to no PSRAM). However I still do not get a playback. I observed that the serial log is slightly different from the one you sent me a while ago. Reference (yours): info PSRAM not found, inputBufferSize: 6399 bytes info buffers freed, free Heap: 162432 bytes info Reading file: "/wave_test/Pink-Panther.wav" info FormatCode: 1 info DataRate: 176400 info DataBlockSize: 4 info BitsPerSample: 16 info Audio-Length: 1251992 info stream ready info syncword found at pos 0 info Channels: 2 info SampleRate: 44100 info BitsPerSample: 16 info BitRate: 1411200 info Closing audio file info End of file "Pink-Panther.wav" eof_mp3 Pink-Panther.wav

What I get currently: info buffers freed, free Heap: 195768 bytes info Reading file: "/Pink-Panther.wav" info file has no RIFF tag info stream ready info syncword found at pos 0 info Channels: 2 info SampleRate: 16000 info BitsPerSample: 16 info BitRate: N/A info Closing audio file info End of file "/Pink-Panther.wav" eof_mp3 /Pink-Panther.wav

I wonder for instance why the BitRate is set to N/A in my case. Could this be the way how the SD card has been formatted? Are there special requirements there? Internet streaming still works nicely.

[schreibfaul1]

it works: audio.connecttohost("https://github.com/schreibfaul1/ESP32-audioI2S/raw/master/additional_info/Testfiles/Pink-Panther.wav"); and when you download the file and save it to the sd card it doesn't work? audio.connecttoFS(SD, "/Pink-Panther.wav"); It looks like your wav file is corrupt and the RIFF header is unreadable.

[Protonerd]

That was a good idea, and playing the same file from the internet works OK. So we have 2 options left:

• either the file is corrupted
• or there is a problem reading and playing the file from an SD-card

[Protonerd]

I reformatted the SD card using Windows utility, File system FAT (default), allocation unit size default. Then I stored the wav file directly from github to my SD-card. Heureka, now it works. I still do not know if the reformatting did the work or the direct copy, I suspect rather the latter. Thanks Wolle for the help!

[markbiasotti]

@Protonerd
Can you post your wiring between the Huzzah32, MAX98357A and SD breakout? I'm using the same three and not getting any audio from my .wav file on the SD card. I believe I have formatted it but I could have my wiring between the three incorrect. Here's my original post: https://forums.adafruit.com/viewtopic.php?t=209829

thank you

Mark

[Protonerd]

I haven't played with it for some time, so I'm not even sure this was the working wiring, but the way it's wired up on my breadboard is as follows: A1 -> DIN (MAX98357A) 27 -> BCLK (MAX98357A) A0 -> LRC (MAX98357A) MI -> DO (SD breakout) MO -> CLK (SD breakout) SDA -> CMD (SD breakout) SCK -> D3 (SD breakout)

[markbiasotti]

Thank you for your hookup. I will take a look at mine and confirm.

Mark