It does okay with the CCIF IMD 19+20kHz sines, but introduce audible artifacts on the udial sample.
Surprisingly, the Galaxy S4 Exynos on Lollipop does better, so Samsung mobile missed something here.
#supercurioBlog #Samsung #audio
Audio
The audio codec used is Cirrus Logic / +Wolfson Microelectronics WM1840, which is not a part listed on their public website
http://www.cirrus.com/en/products/codecs.html and also rather elusive on the web.
As there's outputs named HPOUT1L to HPOUT3R, I would guess that it's equipped with 6 DAC channels to line/or amplified headphones out, and from with the same approach 4 DAC channels to speaker out.
I count as well 4 audio input interface (from the CPU to the codec), 2 stereo ASRC, 2 stereo DRC, and DSP count goes from 1 to 7.
Well you got the point, lots of channels and mixing capabilities 🙂
Galaxy S6 audioflinger native sampling frequency is 48kHz.
I didn't evaluate the quality of the resampler yet.
Camera
The back camera sensor is confirmed to be a Sony IMX240, the same as rumored and already present in the Note 4.
It means the additional features compared to its bigger brother come from ISP capabilities, not the sensor itself.
#supercurioBlog #MWC #samsung #audio #teardown
Codecs – Smart Codecs with Integrated Programmable DSP, Portable Codecs, Mono/Stereo Codecs, Multichannel Codecs, AC ’97 and HD Audio Codecs, Noise Cancellation Codecs
Part, DACs / ADCs, Dynamic Range (dB), THD+N (dB), Sample Rate (kHz), Analog I/O, Power Supply (V), DSP and Other Features, Package. WM8281Buy Now Sample, 8 / 6, 121 DAC; 100 ADC, -92 DAC; -89 ADC, 192, Single-ended. Differential, VA = 1.7 to 5.5; VD = 1.14 to 1.9, Multi-Core, 600 MIPS …
Android L now supports floating point (32 bit) audio.
16-bit limited AudioTrack and everything else no more.
New: android.media.AudioFormat.ENCODING_PCM_FLOAT
Audio data format: single-precision floating-point per sample
And if you're not convinced why, see this sweet video from +Glenn Kasten
Note that for now it's only the source code obtained following original +Wolfson Microelectronics pdf guide from Andy Laing here:
http://www.element14.com/community/thread/31714/l/instructions-for-compiling-the-wolfson-audio-card-kernel-drivers-and-supported-use-cases
+Wolfson Microelectronics patches have conflicts with latest repository state. I didn't tried to merge latest commits for now but let me know if you do!
https://github.com/supercurio/linux-raspberry-pi/tree/rpi-3.10.y-wolfsonmicro-beta
WM5102 and WM5102s announce higher DAC & headphone amp specs but the WM5110 has a much higher compute capability and also better ADC.
Think about: decoding and playing compressed audio streams while the system sleep; stuff like that.
You can take a look at apparently leaked product briefs linked.
(WolfsonMicro's website doesn't share it for now)
Source: +Teardown.com
http://www.techinsights.com/teardown.com/samsung-galaxy-S5-teardown/
With pics of the whole thing, even bits of x-rays of some chips.
#supercurioBlog #audio #teardown
www.alpha-audio.nl/wordpress/wordpress/wp-content/uploads/2013/05/Wolfson-wm5110.pdf
Not a clean job and I even resorted to glue to make some modifications while overall not having the right tools at my disposal.
Until there's a dedicated case for this setup it's still better than no case at all: easier and safer to handle 🙂
I might cut the remaining screw length now, what do you think?
And when I stumble upon a song or an album I've been used to listen to in lossless/FLAC, I'm like hmm no that's not quite it.
I wonder if I would be able to discern random samples using the same codec & bitrate and lossless in ABX test.
Maybe it makes a difference when you know a song very well in it's original lossless format already.
I would describe the main difference being in:
– impact of drums, typically snare drums and cymbals
– some flanger effect and loss of temporal resolution in vocals
– loss of resolution in synthetic instruments like those found in electronic music like trance or dubstep, or practically everything shaped like a square or triangle wave.
I still think All Access is probably the best sounding streaming service, and content discovery is great but boy I would like to be able to stream lossless instead. It's not the same experience.
Also I don't recommend to spend days listening to samples of every available audio compression codecs at various bitrates in order to find the transparency sweet spot for them.
Because you can't un-train your ear after that, too late ^^
https://twitter.com/eddie_wolfson/status/396253349927866369
https://twitter.com/eddie_wolfson/status/396280873412071424
DIY and other audio enthusiasts might also like to build build stuff and play with it.
Why is this audio extension to the Raspberry Pi special?
As stated by Eddie, the main codec powering this board is WM own WM5102 Audio Hub.
http://www.wolfsonmicro.com/products/audio_hubs/WM5102/ plus what's necessary for SPDIF intput and output and more
WM5102 key features for me:
– 113dB SNR to Headphone out (DAC+amp)
– Headphone driver evolved from WM8994/WM1811 codecs as used in Voodoo Sound but with much lower hiss levels
The addition of SPDIF input means you can use it as standalone DAC.
But as it will be plugged on the Pi, it transforms it in a high quality 192kHz/24bit capable player on analog output with a lovely sounding headphone amp, gives it a standard SPDIF output without relying on HDMI, and also recorder for SPDIF and analog inputs.
I already have a head full of network audio rendering capabilities ^^
My first goal with this would probably be to:
– install pulseaudio on the Pi
– output everything from my computers here
– then plug my headphones here to finally have a DAC+Amp that sound good to drive my various headphones (especially the HD650) when I'm not using speakers.
Among other things 🙂
I'll see how it fares with some simple measurements and listening tests but I already expect higher sound quality than the typical over-hyped DACs+HP amp promising so much, being praised to no end and delivering so little in reality.
Also this WM5102 is present in Galaxy S4 I9500 but Samsung made several implementation errors preventing the phone to reach quality levels WolfosonMicro audio hub is capable of.
So this would also be a bit like a dev board to play with to no end and with very little limitations. Lovely!
I guess we'll need to wait a little bit to know more about price.
Community: Wolfson Pi Audio Card | element14
The Wolfson Pi Audio Card produced in partnership with Wolfson, the premier audio solutions chip company, offers Raspberry Pi users similar flexibility to a PC soundcard to capture audio alongside their camera, and experiment with stereo digital capture and playback.
Its globally convincing (zippy, IPS display with alright color rendering, no obvious bug/flaw) especially for the price: I bought mine for 139€ shipping included on +eBay .
But it sounds a bit off to me so I had to measure the output.
RMAA measurements show THD and IMD+Noise higher than any WM8994 / WM1811 device I tested so far 🙁
My ears are just too sensitive: ruins listening experience. grrr.
You can compare to stock unmodified Nexus 10, powered by the same #WolfsonMicro #WM1811
#supercurioBlog #audio #measurements
RightMark Audio Analyzer test : Galaxy S Wi-Fi 4.2 Volume Max
RightMark Audio Analyzer test : Galaxy S Wi-Fi 4.2 Volume Max
#supercurioBlog #audio #measurements #article
Samsung Galaxy S 2 (International) Review – The Best, Redefined
Intro. We’ve asked Francois Simond (supercurio), creator of the very popular project-voodoo and voodoo-sound improvement packages, and Android hacker focused on sound, video, and image, to set the…
