ESP32-Lyra Smart Audio

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Jakobsen
Posts: 85
Joined: Mon Jan 16, 2017 8:12 am

Re: ESP32-Lyra Smart Audio

Postby Jakobsen » Thu Mar 30, 2017 7:23 am

Hi
Just a small update from here - I did some DSP/biquads on the audio stream and got some experience on how far it can be pushed.

1. Float math very easy to work with and only low overhead compared to fixed point math
2. IDF rev 2.0 rc update gave 50 % better performance on my float DSP/biquad implementation
3. Still has not succeed to use fixed point multiply accumulated optimized instructions

Still have not got any update on missing APLL. It is very much needed as audio SNR due to I2S_BSCK jitter is not good.

Regards Jørgen
Analog Digital IC designer / DevOps @ Merus Audio, Copenhagen, Denmark.
We do novel and best in class Audio amplifiers for consumer products.
Programmed assembler for C-64 back in 1980's, learned some electronics - hacking since then

sergiosmail
Posts: 1
Joined: Wed May 10, 2017 10:49 am

Re: ESP32-Lyra Smart Audio

Postby sergiosmail » Wed May 10, 2017 10:52 am

Hi guys

:geek: Nice to hear that! I just want to stay up to date, joining this thread.

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rudi ;-)
Posts: 1563
Joined: Fri Nov 13, 2015 3:25 pm

Re: ESP32-Lyra Smart Audio

Postby rudi ;-) » Thu Jan 11, 2018 8:58 am

hi

I have never touched or had or have never had a lyra in my hand, am so sory for this ....never get it to play with them...

Image




but now, ... it seems like lyra is getting a competitor now.
RDA5981_UNO_.jpg
RDA5981_UNO_.jpg (163.62 KiB) Viewed 4317 times

other version:
preview-three.jpg
preview-three.jpg (88.27 KiB) Viewed 4317 times
preview-two.jpg
preview-two.jpg (106.32 KiB) Viewed 4317 times

..and not only lyra, this RDA5x series it's damned serious to take.

happy new year :D

best wishes
rudi ;-)
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love it, change it or leave it.
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rudi ;-)
Posts: 1563
Joined: Fri Nov 13, 2015 3:25 pm

Re: ESP32-Lyra Smart Audio

Postby rudi ;-) » Mon Jan 29, 2018 8:42 pm

hi folks

ESP32-LyraTD-MSC board arrived last days EU :o 8-)

Image

Image

Image



there was a firmware preinstalled, comes without document but after i backup'ed the firmware
before i start - could find some things in the backup firmware
so sscm commands was here found, did build fast&dirty serial command tool and the first test with espressif preinstalled firmware was ok.

i find then by testings a nice Hint in the log and did try a imagine wakeword "HiEspressif Alexa" and
the second test then with espressif's own wakeword technic was successful. 8-)

i will try in next steps to get out the hardware on the Lyra board ( used DSP and so on ) and drive more testings then.
not sure, if there is one more people who get this audio hdk board now? ( engineering sample )

feel free to give some tips / share knowledge or ask your questions.

espressif noted, that nice firmwares follows for testings, stay tuned!


best wishes
rudi ;-)

btw:
a try with th sd card was first moment fail ( pullup missing )
( want test adduri file:// ..mp3)
but there is a switch/jumpler array - and i think we can switch pullups to the lines
so this is not a problem, will wait for the docu to the switch/jumpler array.
in the meantime i will use scope and route/search the lines - perhabs i find the src.
let's see what happen's :)
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barometre
Posts: 22
Joined: Mon May 09, 2016 11:22 am

Re: ESP32-Lyra Smart Audio

Postby barometre » Sat Feb 03, 2018 12:48 am

Where can we get one?

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rudi ;-)
Posts: 1563
Joined: Fri Nov 13, 2015 3:25 pm

Re: ESP32-Lyra Smart Audio

Postby rudi ;-) » Sat Feb 03, 2018 11:57 pm

barometre wrote:Where can we get one?
engineering samples - no MP yet - follow this thread
best wishes
rudi ;-)
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love it, change it or leave it.
-------------------------------------
問候飛出去的朋友遍全球魯迪

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