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Quel DAC à la place du DAC100 avec le système ERGO ?

Message » 03 Juin 2011 14:23

Pure Music ou Pure Audio? :idee:
Longtemps je me suis casqué de bonne heure…
dub.
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Quel DAC à la place du DAC100 avec le système ERGO ?

Message » 03 Juin 2011 15:08

Pure Music de Channel D ;-) désolé pour la confusion, je rentre de vacances, je crois que je vais repartir :mdr:
Ecoutons, écoutons, écoutons !
Olivierpe.
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Message » 04 Juin 2011 3:15

J'ajoute que, de par l'usage de ce player, la sortie optique du MacBook Pro retrouve tout son interêt, puisqu'il y a de nouveau une différence Toslink / USB, mais à l'avantage du Toslink cette fois, ce qui n'est pas pour me déplaire, puisque cela me permet de faire passer mes albums en 24 bits / 96 Khz :wink: Bref, un bon investissement, vraiment ! :love:
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Olivierpe.
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Message » 04 Juin 2011 14:17

Une info supplémentaire qui peut-être intéressante dans ce fil, puisqu'on avait évoqué la puissance de sortie du DAC Atoll, et, consécutivement, la mieux apporté par une diminution du volume de sortie "numérique".

Le site de Channel-D apporte quelques précisions sur ce sujet, à prendre d'une manière génerale, pas forcément en lien avec leur soft :

It's true: word length (resolution) is reduced with a digital volume control!

This effect is mitigated by dithering. Dithering reduces the distortion caused by word length reduction, by mathematically randomly "jiggling" the low order part of the digital data, when the volume is reduced.

A properly dithered digital volume control will introduce no audible sound quality degradation when listening to music between -6 and 0 dB. A digital volume control may be audible depending on the resolution of the audio system (and how carefully one is listening) beginning at settings below about -12 dB.

An additional balancing factor is that the distortion level of DACs tends to rise at signal levels above -10 dB vs. digital full scale. By increasing the volume above -10, more resolution is preserved, but at the expense of higher (measurable) distortion. The net result of this trade-off is that volume levels between -12 and 0 dB represent the "sweet spot" of a digital volume control. And depending on the design of your DAC, because of increasing distortion at higher output levels, the overall sound quality may well be better with digital volume settings below 0 dB.

A dithered digital volume control easily can match the quality of an analog volume control if the overall gain structure of the system (see below) is properly set up. In other words, the loudness of your system when you are actively engaged in listening to music should be obtainable with a digital volume setting between -12 and 0 dB.

Note: If your music collection includes lossy compressed music (MP3 or AAC), in particular, "loudly" mastered tracks which reach 0 dBFS, using a digital volume control will be beneficial. At least as far as Channel D's Pure Music / Pure Vinyl playback software is concerned, the digital "overs" generated internally by the lossy to PCM audio converter will be preserved by setting the volume control to -1 or -2 instead of 0, regardless of whether or not you choose to use a strictly analog means of controlling the volume.

Another important consideration is the convenience of the digital volume control. This can be operated with a remote, such as Apple's Remote App on an iPad/iPhone/iPod Touch, or with a wireless Bluetooth mouse or keyboard.
Ecoutons, écoutons, écoutons !
Olivierpe.
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Message » 29 Mai 2012 19:23

Olivierpe a écrit:Une info supplémentaire qui peut-être intéressante dans ce fil, puisqu'on avait évoqué la puissance de sortie du DAC Atoll, et, consécutivement, la mieux apporté par une diminution du volume de sortie "numérique".

Le site de Channel-D apporte quelques précisions sur ce sujet, à prendre d'une manière génerale, pas forcément en lien avec leur soft :

It's true: word length (resolution) is reduced with a digital volume control!

This effect is mitigated by dithering. Dithering reduces the distortion caused by word length reduction, by mathematically randomly "jiggling" the low order part of the digital data, when the volume is reduced.

A properly dithered digital volume control will introduce no audible sound quality degradation when listening to music between -6 and 0 dB. A digital volume control may be audible depending on the resolution of the audio system (and how carefully one is listening) beginning at settings below about -12 dB.

An additional balancing factor is that the distortion level of DACs tends to rise at signal levels above -10 dB vs. digital full scale. By increasing the volume above -10, more resolution is preserved, but at the expense of higher (measurable) distortion. The net result of this trade-off is that volume levels between -12 and 0 dB represent the "sweet spot" of a digital volume control. And depending on the design of your DAC, because of increasing distortion at higher output levels, the overall sound quality may well be better with digital volume settings below 0 dB.

A dithered digital volume control easily can match the quality of an analog volume control if the overall gain structure of the system (see below) is properly set up. In other words, the loudness of your system when you are actively engaged in listening to music should be obtainable with a digital volume setting between -12 and 0 dB.

Note: If your music collection includes lossy compressed music (MP3 or AAC), in particular, "loudly" mastered tracks which reach 0 dBFS, using a digital volume control will be beneficial. At least as far as Channel D's Pure Music / Pure Vinyl playback software is concerned, the digital "overs" generated internally by the lossy to PCM audio converter will be preserved by setting the volume control to -1 or -2 instead of 0, regardless of whether or not you choose to use a strictly analog means of controlling the volume.

Another important consideration is the convenience of the digital volume control. This can be operated with a remote, such as Apple's Remote App on an iPad/iPhone/iPod Touch, or with a wireless Bluetooth mouse or keyboard.


Olivierpe je voie que tu vend ton dac 100 je pourrais etre intérréssé mais impossible de t'envoyer un MP donc si tu lie ce message mp me :lol:
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Message » 30 Mai 2012 14:03

Bonjour je n'arrive pas à vous envoyé de MP je suis intéresser par votre dac 100

Cordialement
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