Search found 49 matches

by Jakobsen
Mon Aug 28, 2017 7:17 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 86
Views: 3205

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: 1263

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: 148
Views: 20272

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: 148
Views: 20272

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...
by Jakobsen
Mon May 08, 2017 10:50 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 148
Views: 20272

Re: ESP32 Webradio

Hi Buddy Nice work on the Bluetooth implementation - I have BT audio streaming up running with my 32 bit I2S interface to my MA12040P :-) Push in 4 extra bytes pr L/R samples set and got stable audio flow. But audio is very distorted / sounds more like playing what is left out in the joint_stereo se...
by Jakobsen
Thu May 04, 2017 8:42 pm
Forum: Showcase
Topic: ESP32 with RT-Thread and esp32radio :-)
Replies: 3
Views: 893

Re: ESP32 with RT-Thread and esp32radio :-)

Hello Bernard

I will be very happy to test drive you code maybe add some dsp audio processing if you have any spare mips left :-)

Regards Jørgen
by Jakobsen
Tue Apr 18, 2017 1:19 pm
Forum: ESP32 SDK
Topic: rtc_clk_apll_enable函数调用失败
Replies: 18
Views: 16791

Re: rtc_clk_apll_enable函数调用失败

Hi All Audio using normal PLL on rev_0 is OK for prototyping and to get the party started. Your will hear a 'hiss' type noise if you dare to face ear close to speaker. But when your crank up the volume, noise it is covered. Below 1KHz sine using 32 sample lookup table on ESP32 rev_0 PLL clock - 24bi...
by Jakobsen
Tue Apr 18, 2017 8:59 am
Forum: ESP32 SDK
Topic: rtc_clk_apll_enable函数调用失败
Replies: 18
Views: 16791

Re: rtc_clk_apll_enable函数调用失败

Hi To my understand on rev_0 hardware the APLL resolution is not good enough for generating a 2.8224 Mhz i2s clock due to bug on sdm1 and sdm0. On rev_0 we can use normal PLL to generate i2s clock close to 2.822 MHz but it will have clock jitter. I did measurements on noise floor due to that clock j...
by Jakobsen
Mon Apr 17, 2017 7:32 pm
Forum: General Discussion
Topic: Audio Support
Replies: 12
Views: 11455

Re: Audio Support

Hi No I have not done extensive test on BT audio - Still working on Web mp3 streaming / DSP basic functions and optimizing of MIPS. I will let you message pass on to people in charge of sales. - I know we have been in a stage of limited / prioritized sampling - but that should be over by now. APLL i...
by Jakobsen
Mon Apr 17, 2017 6:46 pm
Forum: Showcase
Topic: ESP32 Webradio
Replies: 148
Views: 20272

Re: ESP32 Webradio

Hi Buddy Nice call - moving audio configuration to the menuconfig setup tool - very handy. And code works out of the box. Yes - I will send you a diagram for wiring up our amp. Do you have the small demo board or our evk - cannot recall what I send you? Small demoboard is 4x5cm - evk is 7x8cm with b...