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Standard USB audio steaming speaker development

We need a simple (existing) solution to take the USB audio out from smartphones' USB port, and then DAC, amplify, and drive an external speaker.

We only need to work with the standard USB audio out. See image below.

[url removed, login to view]

In summary, we want the circuit from the USB audio output port of the phone all the way to the external speaker.

We only look for people who have the existing solution already.

Thanks for your interest.

This is a hardware design engineering task. We only look for people who have the existing solution already.

Update:
Beside the standard USB DAC, we also need:

1. A USB (audio out) DAC (sound card) with headphone out for the latest apple iPod. The audio stream source (out) of ipod needs to be taken from USB interface (digital audio signal), not the traditional headphone jack of ipod.

2. USB DAC for latest Android phone and take the audio stream from the USB/charging port and convert to headphone jack signal (analog stereo audio).

See the difference here:

http://cdn.head-fi.org/c/cd/cdb92345_480480_4317734867479_2047049317_n.jpeg

You may send quote for any of these projects.

Skills: Electrical Engineering, Electronics, Microcontroller, Scientific Research

See more: standard speaker, standard, image fi, dac, c# usb, 2012 standard, audio image, electronics circuit, audio usb, electronics simple circuit, usb circuit, work usb, speaker circuit, audio usb interface pcb, audio usb pcb, audio output, usb audio output, usb audio, iphone development inapp audio streaming, audio file standard american english, iphone development streaming audio wma, iphone development stream audio, development streaming audio player, port usb, usb drive

About the Employer:
( 0 reviews ) Lawrence, United States

Project ID: #2553663

2 freelancers are bidding on average $275 for this job

betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha More

$200 USD in 4 days
(17 Reviews)
4.8
DamithaKD

Read Pm sir :)

$250 USD in 10 days
(6 Reviews)
3.9
SanducAndrei

Hi, i have develop this solution 2 months ago.

$300 USD in 7 days
(11 Reviews)
3.2