- #522 [長長影子], 19-10-29 15:17
- #521 [Ck2007], 19-10-29 12:59請教長長影子兄:
MQA有分軟解硬解嗎?Render level?
如果有硬解唔多人提MQA係咪有廠方專用chip?
最近入咗chord mojo+poly, poly streamer support MQA, 我又有用Roon可以先解MQA才輸出, 兩者有分別嗎?
最後修改時間: 2019-10-29 13:00:08 - #520 [shektau6], 19-10-10 11:47https://stackaudio.co.uk/link/
Anyone has experienced with this streamer?
"
The LINK has a solution to the problem of digital noise. We worked with renowned audio electronics engineer John Westlake on the LINK streamer. With over 25 years of award-winning designs to his name in digital audio, John is the perfect partner for Stack Audio and an expert in removing noise from the signal path." -
- #519 [addyg], 19-10-06 17:56#518
Thanks - #518 [長長影子], 19-10-06 17:01係,但要小心選擇DDC,就算用相同嘅 XMOS chip,出嚟嘅結果都可以幾參差吓。
- #517 [唐吉訶德], 19-10-06 16:56是的,買件 xmos 晶片的已經可以
大陸平價只要不帶 analogue 輸出的都好 - #516 [addyg], 19-10-06 13:43依家好多二手dac無usb係咪買個usb to coaxel 轉換器就用到?
- #515 [cashotline], 19-10-05 15:19你滿足到"聲音"靚聲嘅根本,即是靚聲應有"物理結構"自然會好聲,dac芯片只是各有性格差異並無優劣之分
最後修改時間: 2019-10-05 15:22:27 - #514 [長長影子], 19-10-05 15:09的確無話邊種 DAC 最好,每種電路設計都有其優/缺點。 正如 R-2R DAC 比較受 conversion speed 限制、glitch noise 明顯、對 jitter 嘅影響又特別敏感等等問題,就算想用好啲嘅 oversampling 嘅方法都未必得,因為 over-sampling 並非問題癥結所在,問題係用咩方法做去 over-sampling。
•NOS DAC may sound OK
•We really don’t notice much beyond 20k...
•NOS DAC sometimes sounds better than same DAC with digital filter
•DAC in these experiments is invariably ladder type
•Glitch contribution goes up with sampling rate
•Latch signal passes through filter chip (increased clock jitter) - #513 [addyg], 19-10-05 11:35Streamer 各有各行啦。
重點係可以聽到Tidal Spotify Moov 各大平台,重有自己嘅files。
無話邊個dac最好。出聲自己enjoy到咪ok。 - #512 [DYreal], 19-10-04 00:33數字絕對唔係代表一切,但亦都唔係佢冇某啲代表價值。
廠家只係嘗試去找尋邊一類嘅測試數字可以真正反應到器材嘅播放能力或者效果。
暫時未睇到廠方公佈嘅數字邊啲一睇就知道一定好聲(一定好力就或者睇到)。
有返咁上下年紀其實都好難聽到12000Hz或以上,所以再高頻(e.g.SACD)都未必有幫助,可能只係增加咗一啲高頻噪音,但當然bit數增加就會增加咗啲細節,呢個應該有幫助。
其實好多人玩膽機個頻寬都未必去得好高,但係都覺得好好聲。
所以對啲數字未必需要咁認真。
嗻等於MQA就算你真係做到輸入輸出個波形完全一樣,都唔係代表部部機出嘅聲一樣,亦唔係個個師兄都鍾意。佢地點都要加鹽加醋調下聲,去返自己鍾意嘅聲底。
所以世事無絕對,最緊要真情趣。
Enjoy yourself.
或者再補充一句,如果要玩NOS要好聲就最好係用R2R DAC。
最後修改時間: 2019-10-04 00:41:01 - #511 [Syuencb], 19-10-04 00:00數字規格真是這麼重要嗎?
只要高過16-44.1就一定靚聲? - #510 [長長影子], 19-10-02 13:01
- #509 [jason121314], 19-09-30 15:21.
- #508 [jason121314], 19-09-30 15:20用MQA CD rip出來的file經有 MQA decode的功能DAC會爆出24/352.8KHZ
- #507 [長長影子], 19-09-29 12:33"當然,我仍然覺得 MQA 應該係去開發 DAC。
MQA decode 完仍然是一般音頻訊號,而 pre-rining 係在 DAC 時發生。
即即使 MQA 保證了檔案內容完美,在臨門一腳依然係用傳統 DAC,問題仍在。(假設用 software decode mqa 先啦)"
<- 如果部 DAC 本身已經係 MQA 認證, MQA 解碼時可以識別該 h/w,因此 DAC 嘅 pre-ringing 等問題係可以從 MQA 解碼中得到正確嘅修正/補償。 但受 h/w 限制唔同嘅 DAC 質素當然仍然存在高低之分。 有興趣嘅話可以睇睇 dCS 網頁嘅介紹。
"The MQA Renderer performs sampling reconstruction under song-by-song instruction from the encoder, while at the same time matching and optimising the attached DAC to deliver an authenticated analogue output."
"MQA Decoders include a Renderer which is customised for each built-in digital-to-analogue converter. Generally, the converter includes an integrated DAC which is not wholly configurable and may have some performance limitations. For this reason, most MQA decoders include precompensation for the built-in converter..."
https://www.dcsltd.co.uk/dcs-launches-mqa-support-across-product-ranges/
最後修改時間: 2019-09-29 12:35:41 - #506 [addyg], 19-09-29 11:23係呀一般綠色燈仔係全解MQA。個音場就會出返黎
- #505 [Ck2007], 19-09-29 11:16我用Roon可以software MQA decode 睇過cary新機介紹話MQA software decode 只可解一層已hardware decode可以全解. MQA 燈顔色来區別解碼程度.
- #504 [addyg], 19-09-29 10:40安橋cheap 嘢dp-x1a 反而support 到MQA。
大部分dac要有MQA燈仔着就係decode 到100%MQA (e.g. file name .flac.mqa ) - #503 [addyg], 19-09-29 10:32Cambridge audio 唔support MQA 住。所以7千到2皮係唔一定support 到。
Cambridge Audio Support TIDAL Frequently Asked Questions
Does the TIDAL update support MQA playback?
There are currently no plans to integrate MQA support into any of our current products as this would require a hardware modification to install a Full MQA Decoder.
As MQA files are packaged inside any lossless container such as FLAC, WAV or Apple Lossless, this enables them to be played from your PC or Mac via a USB Audio connection to a Cambridge Audio Network Player even though a Full MQA Decoder is not built into the unit. - 下一頁 (1 of 27)
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"The first unfold of the file, gives you the file as recorded in the studio, this is what Roon and Tidal do. Two things happen at this moment, the unfolding of the file (for example from 16 bits/44.1kHz to 24 bits/88.2 kHz) and to apply a correction of the impulse behaviour of the ADC. Older recordings are known, especially those recorded at 44.1 kHz or 48 kHz used to have steep filters which impacted the impulse behaviour. As a result these filters cause pre and post ringing which create a less natural sound."
"The second unfold is geared toward correcting the impulse of the digital to analogue converter. This process is dedicated because every single DAC has its own behaviour. Especially the oversampling DAC’s use steep filtering but this all depends per DAC, more or less. Aforementioned filters are always applied just “above” the music and do have a negative impact on the impulse behaviour. To solve this one can suppress the filter by using up-sampling technology, as an example the unfolded file of 96 kHz is being up-sampled to 192 kHz or even 384 kHz sampling. As a result the filter is being detached from the music and the filter becomes less steep, but still steep. Up-sampling often creates artifacts, but these are considered less annoying than steep filtering."