[Galaxy S I9000 Android Development] supercurio:
Hi dear sound lovers.

The compilation of your feature request was so promising for me that I suddenly couldn't resist to write some Voodoo sound code :)

So there are already 2 commits related to Voodoo sound:

Headphone amp gain :

http://github.com/project-voodoo/linux_gt-i9000/commit/62e580cd4de97ec0039bf22a297d415f0f986a95

First usage of the parametric EQ: an anti-alias filter for bright headphones

http://github.com/project-voodoo/linux_gt-i9000/commit/df44533e336c5fde76a0912ad1c68d5f08f38e08

The second one may become obsolete once I'll get total knowledge of the WM8994 sound codec, sound driver and Android sound system internals.

And, you guessed, i very much plan to do that!

Now about the Bounty

1/ Mic sensitivity

This is the big winner of this bounty contest ;)

Both in term of requests and amount. Logically, I'll work on this one first.

Expect it to be included in first or second Voodoo sound release.

Of course this enhancement will need to be done very carefully. I'll take the highest care not disturbing voice calls, voice memos, Shazam/Shoudhound song recognition.

Because I already studied the subject, I can tell you that people who know code may find the patch very short.

Most of the work will consist to elaborate ideal settings for every possible situation.

From filming insect's buzz :

To capturing music video during the latest Deftones live show

If default are not good enough, I'll implement more complex code but will propose a usable interface to control it.

ETA 2 weeks

asked by: crossbone85, BronzedDroid, crossbone85, BronzedDroid, mike.sw, webcrtor, darkflyer1983, efegue, nsgtr34, rafalense, Anduru, Cazador-, GwynBleidd

2/ True line-out

I don't have yet the confirmation it can be done yet, but as it's a requested feature I'll study it and you know that if it can be done... it will !

If the hardware don't allow a direct line out from the DAC bypassing the headphone amplifier, I will improve the sound quality of the output anyway.

The very first release will already allow you to set the output gain to the standard level you expect from a Line-Out. This will resolve most headaches currently caused by the fact that the default output is very quiet.

asked by: morfic, eeyunopper, NeronLux

3/ Headphone amplifier gain

Yes, some headphones needs special capabilities because

- Their impedance is high, sound is too quiet

- Their sensitivity is very high, and you hear too much hiss.

Sensitive in-ear tend to become the norm and because of their isolating nature you hear even more this annoying hiss.

Headphone amplifier gain is the adequate answer to these 2 problems, and if it appear very simple, device in our digital era are extremely rare!

Now Galaxy S will be part of this ultra-elite club.

You planned to buy an expensive external amp because you thought your beloved headphones sound bad? Think again !

− however you can think about my donation link :P −

4/ 5-band Hardware Parametric EQ

This one will be totally awesome. Too bad a system-wide EQ is not part of Android.

Will combine

- sound quality: +-12db adjustment without saturation or distortion

- with the best power efficiency: use no battery.

5/ Radio Noise

Will probably be the most difficult to archive, but I already have some ideas about it.

However, don't expect a "perfect" solution.

asked by: stranger812, Aj12

6/ iPhone headset support

Want to use iPhone IEM+mic on your GT-I9000? You're not alone!

asked by: many people.

7/ Call through headphones

I don't understand why you cannot do that. Do you?

Looks obvious but may require some profound changes in several software and hardware layer... or not.

Not studied yet.

asked by mcmac7, darkstar2k77. Maybe more people.

8/ General sound quality

Optimizing the sound quality and squeezing the best performance out of the top-notch WM8994 hifi audio codec is the main essence of this project, by a sound lover for sound lovers.

Count on me to make this phone the best Android phone to enjoy music, if not one of the best mobile audio source in all categories.

Is it ambitious ? Yes but thanks with the Wolfson Micro high end hardware present in this phone you could be surprised ;)

asked by dsellers2

8/ Bluetooth gain & A2DP streaming issues

Bluetooth stereo is not audiophile's favourite but sometimes it's so much more convenient!

I'll study and also improve this way of listening to music.

asked by FloridaK and TheTodFather .

9/ Specialization effect for headphones & Crossfeed

One of the first version will include support of the hardware 3D effect.

In my opinion, most effect called "3D" something are pure crap. This one is the exception because it's able to improve soundstage and preserve musicality at the same time.

True crossfeed will be trickier to get done, but nothing is impossible. Once again, this is a bout system-wide solution that work on every sound source.

asked by cbdrift

10/ Other various requests

- Multi-track recording support by thurtig

- VOIP fixes by magpolson

PS : remember it's a Bounty thread.

Format:

- Feature requested + description

- development contribution

Thanks :)