【DAC‧耳擴】Resonessence Labs Invicta (DSD 128, DXD, PCM 384)

[Leo Yeh]

SD效果目前聽起來就是比較好 背景更黑 音質更純淨 也能支援到DSD128

[chengshuang]

您的意思是，SD卡一样可以解码：DSD 128, DXD, PCM 384吗（SD卡功能与其他接口一致）？

还弱弱的问一句， Invicta 直解DSD码？还是PCM转码？

[Leo Yeh]

yes SD 可

ES9018可直接解DSD

[chengshuang]

再请教一下叶大，在使用SD卡播放时，能否用 智能手机遥控音量和选曲？

如果可以，一对主动式喇叭加上一部Invicta和智能手机，就全搞定啦！

[Leo Yeh]

iphone或是ipad可能可以，因為他的遙控器是apple remote

有機會我研究看看

[Leo Yeh]

Invicta內部的數位濾波高達7種，是我目前試聽過最多種的 (當然有其他DAC可能有更多種)
用家可玩性非常高
其實Invicta的設定蠻多的，但都很直覺與方便，且都是具有意義與功能性的



Up-sampling Filters in the INVICTA rev 3.0 Software

• The internal Fast Roll-off filter pre-installed in the Sabre DAC.
On the OLED display panel this appears as “Sabre Fast Roll-Off” This is a ‘classic’ FIR filter with symmetrical coefficients, hence it is linear phase and nondispersive.
It achieves excellent suppression of -115db, and so has to have a relatively large group delay of 35 samples. That means, that for a CD at 44.1Khz the group delay is about 800uS. (less for higher sample rates). This filter exhibits pre-ringing, but achieves perfection in rejection: no sample rate artifacts above 22.05Khz are present in the output.

• The internal Slow Roll-off filter pre-installed in the Sabre DAC.
On the OLED display panel this appears as “Sabre Slow Roll-Off” This filter is designed to reduce the group delay present in the Fast Roll-off filter. It is a symmetrical impulse response (i.e. it has symmetrical coefficients), it is linear phase and non-dispersive. It achieves good rejection but the rejection begins slowly, 24Khz or so is
present in the output if the music content has signals near 20khz, but signals higher than that are suppressed. The group delay however is much less, being only 6.25 samples or 140uS at 44.1Khz. This filter also exhibits pre-ringing.

• Resonessence designed, Minimum Phase, IIR Filter
On the OLED display panel this appears as “Minimum Phase IIR” This filter is designed from an analog filter prototype and exhibits no pre-ringing at all. To achieve this, it has to compromise the steepness of the filter; it corresponds to a fourth order analog filter. This is a dispersive non-linear phase filter, but the dispersion has been optimized to the absolute minimum consistent with no pre-ringing.

• Resonessence designed, Minimum Phase Slow Roll-off.
On the OLED display panel this appears as “Minimum Phase Slow Roll-Off” This is a FIR filter that exceeds the specification of the above IIR filter achieving -100db stop band. It is not a linear phase filter because it has non-symmetric coefficients but has been designed to exhibit virtually no pre-ringing (but it does have some) with the minimum of dispersion.

• Resonessence designed, Linear Phase Apodizing Filter.
On the OLED display panel this appears as “Linear Phase Apodizing” Perfectly symmetrical impulse response, hence linear phase and non-dispersive, this filter achieves a high -96db rejection at fs/2 and exhibits the minimum of pre-ringing possible while achieving this excellent rejection. This is the preferred filter of many of our beta-testers.

• Resonessence designed, Linear Phase Fast Roll-off
On the OLED display panel this appears as “Linear Phase Fast Roll-Off” The ultimate FIR filter in the ‘classic’ linear phase category. This filter delivers ultra-high suppression of -120db and extreme flatness in the band. It exceeds the performance of the Sabre DAC pre-installed Fast Roll-off filter.

• Resonessence designed, Linear Phase Slow Roll-off
On the OLED display panel this appears as “Linear Phase Slow Roll-Off” Designed as an enhanced version of the preinstalled Sabre DAC Slow-roll off filter, this is a
linear phase, hence non-dispersive, low group delay filter that has less ripple in band and higher rejection that the Sabre Slow Roll-off filter

[chengshuang]

再请问叶大，SD卡模式可否直接播放SACD ISO文件？

[Leo Yeh]

只能dsf或dff....

[nina0577]

iphone或是ipad可能可以，因為他的遙控器是apple remote

有機會我研究看看

小葉站長有試過iPhone或iPad能否操控他了嗎？

[Leo Yeh]

Remote 用的是紅外線
iPad 沒紅外線
所以不行