Search found 55 matches

by Jakobsen
Wed Nov 22, 2017 10:33 am
Forum: General Discussion
Topic: I2C assert failed,and not work somtimes!
Replies: 7
Views: 442

Re: I2C assert failed,and not work somtimes!

Hi
Same pattern here - I have audio running through wlan on Buddy Casinos Web radio and a web socket to monitor/control my amplifier using a I2C interface. I2C interface random crashed and only power cycle can get system back on track.
Love to get this bug nailed.
/Jørgen
by Jakobsen
Tue Oct 10, 2017 8:29 am
Forum: General Discussion
Topic: I2S digital audio amplifier board for ESP32 Vroom need recommendation
Replies: 8
Views: 414

Re: I2S digital audio amplifier board for ESP32 Vroom need recommendation

Hi Noise issue is all gone :-) Check my post https://www.esp32.com/viewtopic.php?f=17&t=3176 And some I2S dac/amplifer will be insensitive to that any way. The 2x3W will do the job and get you going - But if you want party music level you need a stronger output stage. The Aliexpress option you m...
by Jakobsen
Mon Oct 09, 2017 9:07 am
Forum: General Discussion
Topic: I2S digital audio amplifier board for ESP32 Vroom need recommendation
Replies: 8
Views: 414

Re: I2S digital audio amplifier board for ESP32 Vroom need recommendation

Hi
I have just reviewed Adafruits class D line up. They do not sell any Merus Audio stuff, jet. Until then go with MAX9744 based 20W amp.
Regards /Jakobsen
by Jakobsen
Mon Oct 09, 2017 8:53 am
Forum: General Discussion
Topic: I2S digital audio amplifier board for ESP32 Vroom need recommendation
Replies: 8
Views: 414

Re: I2S digital audio amplifier board for ESP32 Vroom need recommendation

Hi Lim Depends on what audio application you want to end up with. Today any I2S input amp is easy to get up and running. But if you want to increase output power, number of channels, do some audio design, things get a bit more complex. To get started go with the 2 ch adafruit amp. For next level stu...
by Jakobsen
Fri Sep 29, 2017 2:15 pm
Forum: Showcase
Topic: Audio PLL rocking :-)
Replies: 3
Views: 534

Re: Audio PLL rocking :-)

@buddy - Yeeees -so Happy that I have time to do this stuff again. @Sprite - Cool if you stumble on some updated i2s.c, I will be very curious to find out what my magic factor (mf=2) is made of. I have dived into some of the DSP /filter stuff I had to put on hold due to daytime job and other persona...
by Jakobsen
Fri Sep 29, 2017 11:00 am
Forum: Showcase
Topic: Audio PLL rocking :-)
Replies: 3
Views: 534

Audio PLL rocking :-)

Found time and a rev_1 ESP32 module to test out the fixed audio PLL - and heads up for Espressif - Performing just perfect :D http://5.103.131.182/esp32/img/esp32_apll_setup.jpg Small background story: In any audio streaming system, the receiving end needs to sync up to the sample pace that the sour...
by Jakobsen
Mon Aug 28, 2017 7:17 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 114
Views: 9629

Re: What would you like to see in The Next Chip?

Hi Sprite Interesting feedback from all and nice initiative from Espressif. I suggest that you add a TDM hardware block for multi channel audio distribution. It expands the I2S 2 ch limits and make system integration easy on software / audio converter/amplifier side of things. We do see a demand for...
by Jakobsen
Thu Jul 27, 2017 9:17 pm
Forum: General Discussion
Topic: i2c randombly fails
Replies: 14
Views: 2344

Re: i2c randombly fails

Hi Thanks - I have been look for that fix for a very long time - and even considering using a soft i2c driver. No more random fails on i2c. Change from _FLASH to _RAM did the job. ... ESP_ERROR_CHECK( esp_wifi_init(&cfg) ); ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) ); ESP_ERROR_CHE...
by Jakobsen
Wed May 10, 2017 1:31 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 166
Views: 30889

Re: ESP32 Webradio

Hi Buddy Still have some 16/32 bits alligenemt to look into - the BT module give out some dropped package when i do bulk i2s_write. passing through the audio render sound like a good way to deal with diff. audio source. My DSP code is still inline in a early port of your code. It is block based and ...
by Jakobsen
Tue May 09, 2017 9:26 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 166
Views: 30889

Re: ESP32 Webradio

Hi Buddy Yes - Got Bluetooth 16 bits audio interleaved to 32 bits I2S and audio quality again set by i2s clock jitter. Very nice. After syncing to lastest idf-sdk floating point performance has almost increased by 100% - Good news for anyone with plans for advanced DSP audio processing. Need to look...