Portable ADC-DAC for iPhone 4 (iPhone IV) from Fostex - AR-4i + HP-P1 (AR4i + HPP1)

[tiefbassuebertr]

are there practical experiences arround this new Fostex components?

Here some URLs:
HP-P1 | Headphone Amp & Dac | Fostex
http://www.fostexinternational.com/docs/downloads/pdfs/HPP1_manual_e.pdf
AR-4i | Audio Interface for iPhone 4 | Fostex
http://www.fostexinternational.com/docs/downloads/pdfs/AR-4i_manual_e.pdf
Fostex to Launch AR-4i - Fostex News
http://www.fostexinternational.com/public/images/news_img/AR-4i_PRELIMINARY_e_A4.pdf

Fostex | AR-4i (German)
Fostex | HP-P1 (German)

Fostex AR-4i: macht das iPhone 4 zum Fieldrecorder | Sound | News
Fostex to release revolutionary DAC/amp combo!

http://bunniestudios.com/blog/images/iphone4_schematic_pg5.jpg

 

[qusp]

what do you want to know? there is plenty of info over at head-fi.org at least on the HP-P1. the way it works is by basically slaving the iphone/ipod/ipad as a transport of the digital data. it doesnt output i2s so to speak. its limited in bandwidth somewhat, but gets good reviews. you cannot use it as a standalone dac though, it doesnt work as slave, has to be master and doesnt use standard protocol.