【訊源】出人意表的好表現！Chordette Gem藍芽／USB兩用DAC

[建北站]

升級APTX版囉!!!!!!!!!!!!!舊版的也能拿去代理商那升級ㄟ,免費喔!

[Leo Yeh]

新的壓縮技術，不知道進步多少？
CSR's world renowned aptX™ audio compression solutions retain the full integrity of original digital audio and are optimised for instant real-time audio streaming. The suite of algorithms has earned a reputation for some of the highest audio quality, extremely low latency and strong resilience to bit errors, and has been proven in wireless, broadcast and professional live performance applications.

http://www.csr.com/products/60/aptx-bluetooth

Description

By incorporating aptX audio coding technology into the next generation of Bluetooth stereo products, developers can offer consumers audio quality indistinguishable from wired with an impressive dynamic range. aptX encoded audio fits neatly within the available bandwidth of wireless transmission standards to offer an efficient solution for band-width restricted connections.

Key features

• Compression ratio: 4:1
• Audio Format: 16-bit, 44.1kHz (CD-Quality)
• Data Rates: 352kbps
• Frequency Response: 10Hz to 22kHz
• Algorithmic Delay: <1.89ms @ Fs 48KHz
• Dynamic Range: 16-bit: >92dB
• THD+N: -68.8dB

Benefits

• Outstanding Bluetooth Stereo audio quality
• Audio bandwidth matching CD performance
• Flat Frequency Response. Full audio bandwidth faithfully reproduced
• Low audio coding delay. Minimizes latency and ‘lip-sync’ issues
• Non destructive transcoding, means there are no dueling effects with other algorithms
• Uses Time Domain ADPCM principle rather than Psychoacoustic masking
• Small code / data memory size
• Backward Compatibility: when apt-X is not available target device will pair down to SBC

Product details

The aptX Bluetooth audio codec is available for high quality stereo audio over Bluetooth. When incorporated in Bluetooth A2DP Stereo products, apt-X Bluetooth audio coding delivers full 'wired' audio quality. With aptX Bluetooth source material is transparently delivered over the Bluetooth link, whether it is stored uncompressed or in an alternative compression (MP3, AAC, FLAC) format.

• Bluetooth stereo headphones / headsets
• Bluetooth automotive audio
• Bluetooth stereo speakers

[ronaldo]

升級後感覺:
1.連結變快,手機連結少輸入一次密碼.(由1234改成0000)
2.音質明顯更平順,厚實帶甜味.(加了糖,哈)
3.音像型體更清楚一些.
以上我憑印象,升級前後的感覺.

[ERR5292]

感覺聲音改變很大 , 溫暖厚實很多,尤其是人聲部份以及大提琴差最明顯.個人感覺參考參考嘿嘿.....

[cremona]

已經於去年年底升級過了
自己去民生東路的代理商升級的
服務態度實在很難跟友站前一陣子的MICROMEGA事件連在一起
不過前一陣子很少認真聽CD跟電腦訊源
最近很認真的聽了
人聲跟空間感比未升級之前好一些
形體感也有所進步
看來值得幫這小傢伙升級電源供應器
不知國產廠商KINGREX的評價為何?
花個幾千塊錢換大升級應該還好

[cremona]

最近購入一對TELOS金版訊號線
也借了個加料進補的線性電源給GEM
不可同日而語