DS audio 3.0.2

the author of this app says:

For users who own a Synology DiskStation, DS audio allows you to stream your own music stored on DiskStation with your iPhone/iPad/iPod Touch where network connection is available. DS audio also comes with the remote control feature which provides intuitive interface to browse through Audio Station music tank, it allows users to remote control Audio Station music playing on the attached speakers conveniently. Users can also browse music by folders or genres, then able to play music in the background in iOS 4.

With DS audio for iPhone/iPad/iPod Touch, you can:
- Play music stored on your Synology DiskStation with iPhone/iPod Touch
- Browse music by playlist, artist, genre, folder, or album
- Search music with keywords
- Remote control Audio Station's music playing on the attached speakers
- Retina display support
- Support music playback in background in iOS4
- M4B, AAC, WAV, AIF, and AIFF support in streaming mode
- HTTPS support for the secure connection
- For DSM 2.3 and onward

What's New in version 3.0.2

- Support remote control on headphones for music playback
- Fixed an issue to resume music playback when return from phone calls
- Fixed an issue with music in Apple Lossless Audio Codec, ALAC.