DSD2048 is coming to town

hols

看到 Head-Fi.org 有報導Gustard DDC U26 可支援 DSD2048 的消息，急不及待去觀塘找Wilmer馬爺購入一套Gustard U26 + R30。再用PGGB-IT software offline upsample 44.1 wave file 上44.1 DSD2048(90.3M)再用Windows10 desktop HQplayer 4無添加 USB接Gustard U26 然後IIS 往R30.

WOW 美妙音樂自然流出.一切順利絕無hiccup. SQ比起平日用開的DSD1024再高了兩班。音樂從容不逼而且充滿detail. 極富透明度。

Holo May 曾説可支援DSD2048 但因沒有software 所以未能測試到。因此接着再試將DSD2048 經U26 IIS mode 4 接往Holo Audio May  Bravo 有聲出雖然沒有顯示。但聲音是明顯的DSD2048.再聽多幾首可以肯定的是比DSD1024高一個層次的聲音。

殺得性起再試埋Holo Cyan 2  Bravo 也是和 Holo May 一樣有靚聲不過冇顯示。

非常高興。所以多年没有出post都急急出番一個post和大家分享。

hksarac

upsample 44.1 wave file 上44.1 DSD2048(90.3M)????

upsample 44.1 wave file 轉 DSD2048(90.3M)

CKKeung

恭喜 Hols 前輩！

今時今日的 Gustard 數碼產品，真係唔聲唔聲，嚇你一驚！


Gustard R30 dac :


Gustard U26 DDC :



而且有馬爺作香港代理，令人安心！
https://www.hiendy.com/hififorum ... read&tid=150586

tleonard

hksarac 發表於 2025-11-25 08:01
upsample 44.1 wave file 上44.1 DSD2048(90.3M)????

upsample 44.1 wave file 轉 DSD2048(90.3M)

https://community.roonlabs.com/t/whats-is-dsd128x48/20229/2

Most DSD is a multiple of the 44.1 kHz sample rate family. This is a multiple of the 48 kHz family.

第一個 44.1kHz 係指 CD 格式嘅 44.1／16 Redbook，而第二個 44.1kHz 倍數就強調到底係邊一個 family。

48 family 嘅 DSD2048 係 98.304MHz。

44.1 family 嘅 DSD2048 係 90.3168MHz。

食得到 DSD1024 嘅 R2R DACs，用佢本身嘅 XMOS USB 輸入係同時支援 48／44.1 呢兩個 families：

https://www.magnahifi.com/shop/holo-audio-usb-module-4748

咁點解要特登買 Gustard U26 先至有得玩 DSD2048 呢？因為用 Amanero Combo768 再升級埋兩粒 clocks 先至支援得到高出兩倍嘅 sampling rates。

不過暫時應該得 Windows 先至有偈傾，而 Linux 方面可能只有 HQPlayer OS 同埋 NAA images 本身嘅 kernel 版本可以支援 DSD2048。

當然至關重要嘅問題係，因乜解究硬係要玩埋 48 family 呢？答案係過往用 PGGB•IT! 整出嚟嘅 DSD1024，48 family 會靚聲過 44.1 family。

可惜 Gustard U26 家陣嘅 firmware 版本應該係只可以玩 44.1 family 嘅 DSD2048，所以要直接問佢哋黃總呢一位老闆先至知道 48 family 有無機會：

http://www.erji.net/forum.php?mod=viewthread&tid=2385268

racewong

抵玩靚聲

banjo

CKKeung 發表於 2025-11-25 11:00
恭喜 Hols 前輩！

今時今日的 Gustard 數碼產品，真係唔聲唔聲，嚇你一驚！

U26份電做得幾好, 反觀R30, 略兼個水塘唔係幾夠.

banjo

如果加埋Gustard嘅外置鐘嚟玩, 效果會更加好.

pencilngan

硏究下先

JohnWu

R30 最殺食係r2r 結構。用佢解dsd，就利用唔到r2r嗰部份噃。係咁樣嗎？

hols

當然R30的R2R結構是適用於PCM. DSD是用解碼的output stage. 但當DSD upsample 到2048後 資料豐富了很多，聲音的密度、準確度和自然度都已提昇到超越了R2R PCM 。 最近添置了Cybershaft reference clock 令聲音更超了兩班。

JohnWu

hols 發表於 2026-3-23 00:32
當然R30的R2R結構是適用於PCM. DSD是用解碼的output stage. 但當DSD upsample 到2048後 資料豐富了很多，聲 ...

原來up到2048咁犀利。正！

tleonard

25th order 嘅 DSD2048 需要花 36 個鐘頭先至搞得掂一隻 CD，雖然 128GB RAM 應該係個瓶頸位，不過真係要加 RAM 就要四條 32GB 一切換先至得，而且 AI data centers 導致 DRAM 價錢爆升，成本方面亦都唔講得笑：

https://audiophilestyle.com/forums/topic/62699-a-toast-to-pggb-a-heady-brew-of-math-and-magic/page/110/#comment-1338540

當時係為咗散熱先至幫 DDC-U26 加 Cybershaft OP21，假如換咗第二款 OCXO 級數無咁勁嘅 10MHz clock 同埋 BNC 線，Extreme 播放 DSD2048／25 嘅表現仲會唔會依然超越 Olympus 播放 Redbook 版本呢？

換句話講，DSD2048／25 有可能對於時鐘方面嘅要求特別高，最關鍵嘅環節未夠班就隨時比黯然銷魂飯更加黯然失色都唔出奇？

wilmerworkshop

R30 係雙解碼，DSD 部份係用另一份都係 R2R 方式嘅 1 Bit 解碼處理，R26/R26II 都係，並非將 DSD 用 FPGA 軟解成 DSD 再入 DAC，具體技術可以直接聯絡廠家了解

Elamigo

For the users with HQplayer, the latest NAA version fixed bugs to support DSD2048

Maybe using HQplayer experimental Modulator AHM7EC8B that is intended for DSD1024 may also support DSD2048 (pending confirm)

Will sound amazing this Gustard DAC!

Ha! just sharing for the math so people see it more clearly:

44.1 x DSD64 = 2822.4/1000 = 2.822 Mhz
48 x DSD64 = 3072/1000 = 3.072Mhz

44.1 x DSD128 = 5644.8/1000 = 5.644 Mhz
48 x DSD128 = 6144/1000 = 6.144 Mhz

44.1 x DSD256 = 11289.6/1000 = 11.289 Mhz
48 x DSD256 = 12288/1000 = 12.288 Mhz

44.1 x DSD512 = 22579.2/1000 = 25.79 Mhz
48 x DSD512 = 24576/1000 = 24.576 Mhz

44.1 x DSD1024 = 45158.4/1000 = 45.158 Mhz
48 x DSD1024 = 49152/1000 = 49.152 Mhz

44.1 x 2048 = 90316.8/1000 = 90.316 Mhz
48 x 2048 = 98304/1000 = 98.304 Mhz

Elamigo

To add to this great post, I’m sharing the experience of an experienced CAS engineer of HQplayer. His website has so much information to offer on HQPlayer and CAS.

This article compares various DAC solutions to support DSD 2048 and explains why Gustard is best choice.

Sorry English only

DSD 2048 project

Enjoy

Elamigo

tleonard 發表於 2026-4-25 14:11
25th order 嘅 DSD2048 需要花 36 個鐘頭先至搞得掂一隻 CD，雖然 128GB RAM 應該係個瓶頸位，不過真係要加 ...

Hi! Really inspiring your DSD 2048 journey !

The article I added here, explains how to do DSD2048
Streaming. New experimental HQplayer modulators use less
CPU power and can allow easier computing power.

If you have any problems feel free to ask me! Happy to help

hols

It's good to know that StreamFidelity also succeeded to play DSD 2048 in his system. We have been on the same boat some years back when we were struggling with DSD 512 and DSD 1024 and also PCM 1532. We had some communications over the web at that time. He was a banker at that time and ventured into audio business. And now he is going back to banker business again.  Talking about DSD2048 real time upsampling and PGGB are two very different paths. I happened to try PGGB 6 years ago and its no going back.  To me realtime upsampling with HQplayer gives you a tense feeling. There are details but it lacks a sense of ease. And it is not my cup of tea. On the other hand Taiko Audio stress a lot on minimising the CPU function before a natural sound could come out and I am a firm believer of this minimalist theory. It seems that StreamFidelity and Elamigo yourself have not heard PGGB files before and I would encourage to have a listen before making judgement. As for the time required to process a file one can always use the PGGB.IT and use the Microsoft Azure system and one can get a DSD 2048 /25th order file in less than 2 hours so it costs only HK$20 for the Microsoft Azure. Not a big sum really.

tleonard

雖然只係 DSD512，不過呢 10 件 都係 25th order 嘅免費 tracks，所以多數都一樣聽得出 PGGB V8 係龍定蟲：

https://audiowise-canada.myshopify.com/collections/pggb