[T}{OR]

Autor T}{OR

Našao: http://brainbit.wordpress.com/uni-xo...hooting-guide/



Kod WASAPI plugina vrijedi ono kaj je medo napisao.

I gornja tvrdnja je netočna. Sa zadnjim službenim ili bilo kojim UniXonar driverima, i WASAPI se automatski šalta prema rezoluciji snimke - ALI, samo ako je snimka jednom od zapisa koji je ponuđen u Audio Center-u, odnosno 44,1/48/96/192 kHz. Kod moje STX (vjerujem da je to i slučaj sa ST verzijama), kada se radi o rezoluciji koja je negdje između ponuđenih 44,1/48/96/192 - npr. 176,4kHz, WASAPI ne svira pravi Bit-Perfect (niti ručno šaltanje u Xonar Audio Center-u tu ne pomaže), već kartica sama radi resample na rezoluciju podešenu u Xonar Audio Center-u.

Pravi Bit-Perfect s automatskim podešavanjem prema frekvenciji zapisa radi jedino ASIO plugin. Kod mene se taj resampling s WASAP pluginom manifestira kao šum od gramafonske ploče - koji nestane kad prebacim na ASIO.

Trenutno sam na zadnjim, 1.70 UniXonar driverima (Low DPC latency postavka). (NAPOMENA: Ukoliko netko stavlja UniXonar drivere na ST/STX karticu, nemojte zaboraviti maknuti kvačicu s "enable stereo upmix to 5.1/7.1".)

Evo još malo o toj temi, koja potvrđuje moja zapažanja:

With the new driver, bit-perfect playback by the STX card is guaranteed at all sample rates supported by the DMA buffer—44.1, 48, 88.2, 96, 176.4, and 192kHz—and, unlike with the earlier driver, ASIO-compatible applications take exclusive control of the audio device. However, the card's volume control is disabled when it is used in this mode, which makes it inconvenient for headphone listening.

With the Xonar Audio Center open and playing files with Foobar 2000, selecting "Speakers (ASUS Xonar Essence STX Audio Device)" and 24-bit resolution in the Foobar Output Preferences dialog now did give true 96kHz playback, a 40kHz tone being decoded as 40kHz. However, material recorded at 88.2kHz was still sample-rate–converted to whatever rate had been chosen with Audio Center, the 88.2kHz sample rate not being available.

Changing the preferred output device to "Xonar Essence STX bit-perfect ASIO driver" and choosing "Digital Output (ASUS Xonar Essence STX Audio Device)" in Windows 7's Control Panel/Hardware and Sound/Audio Devices dialog did give the correct sample rate for the file being played at the digital output. I tested this configuration with data having sample rates of 44.1, 48, 88.2, 96, 176.4, and 192kHz, and bit depths of 16 and 24; in every case, the data output by the Essence STX were identical to those in the original file. I tested this by recording the output to a new file, inverting its polarity, then playing the old and new files simultaneously in Adobe Audition 3.0. They nulled completely, confirming that the data were the same.

^^
Srećom je ovaj problem oko glasnoće i ASIO plugina popravljen s novijim verzijama Foobar-a.


Što se tiče pojačala za slušalice, tu je Medo potpuno u pravu. Definitivno staviti na high gain. Nakon podužeg slušanja mogu reći kako je razlika ogromna. To mi je zapravo i najveća zamjerka kod kartice, jer kako često koristim slušalice, moram svaki puta kod prebacivanja na sluške smanjti mixer na 50, kako si ne bi izbio bubnjiće.