談錄音...

[Leo Yeh]

來源：DPA

立體聲錄音的寬度跟頻率是有關的，因此想要更高品質的音調(tonal)，那麼麥克風之間的距離就要越寬，建議是最低音調波長的1/4左右，並且要考慮人耳對150Hz以下定位的能力，最佳距離在40~60cm左右。越近的麥克風距離用在接近發聲點以避免某個樂器太寬或不自然。若距離減少17~20cm，那是會被人耳所查覺的，這個距離約等於人兩耳間的距離。

要注意的是麥克風寬度越寬，那麼會影響系統再聲的定位能力，也會影響在Mono重播下的品質。

Since the stereo width of a recording is frequency-dependent, the deeper the tonal qualities you wish to reproduce in stereo, the wider your microphone spacing should be.Using a recommended microphone spacing of a quarter of the wavelength of the
deepest tone, and taking into account the human ear's reduced ability to localize frequencies below 150Hz, leads to an optimal microphone spacing of between 40 and 60 cm. Smaller microphone spacings are often used close to sound-sources to prevent the sound image of a particular musical instrument from becoming "too wide" and unnatural. Spacings down to 17 to 20 cm are detectable by the human ear, as this distance is equivalent to the distance between the two ears themselves.It should also be noted, that an increase in microphone spacing will decrease the system's ability to reproduce the signals from sound-sources positioned directly between the microphones.This will also lead to a reduction in the quality of the stereo recording when it is played in mono.

[Leo Yeh]

X/Y 90 Degrees



用兩隻心型指向性的麥克風成90度，這種錄法定位焦點最好
也適合在困難的環境中使用
缺點低頻不多

In this method, we take two cardioid microphones and place the capsules at a 90 degree angle to each other. In this technique, the microphone on the left is actually wired to the right channel, and vice versa, because of where they're pointing. This technique is considered by many to be the perfect way to get started in recording stereo.

With this technique, you'll get get a recording that's very focused, with a tight low-end response. You'll lose a little depth, but that's made up for in the lack of ambient information. This technique is best used if you're in a difficult-sounding room, and need to "zoom in" on the sound as best as possible.

When used with figure-8 (bidirectional) microphones, XY is called the Blumlein Technique.

[Ted Chen]

SOLID STATE LOGIC’S BROADCAST EQUIPMENT DEMONSTRATION VEHICLE BEGINS ITS EPIC U.S. TOUR



Nicole Smith February 8th, 2012

SSL teams up with technology partners Genelec, Miranda and RTS to showcase the C10 HD Compact Broadcast Console in a state-of-the-art mobile broadcast studio
NEW YORK – Solid State Logic is proud to announce its newly completed Broadcast Equipment Demonstration Vehicle has set out on a non-stop tour of the United States and Canada. The tour began in San Antonio, Texas on Feb 1, 2012 and will continue onwards for the next three years. The custom designed mobile production vehicle features SSL’s C10 HD Compact Broadcast Console and associated routing and I/O solutions in conjunction with all of the key audio and video monitoring and communications systems required for a modern broadcast production facility. Housed in a Russ Berger designed acoustically accurate space, the vehicle enables potential clients to have hands-on experience of SSL’s on-air audio production technology right outside their front door.

“This is an incredibly exciting moment for us,” says Piers Plaskitt, CEO of SSL Inc. “This vehicle gives us a unique opportunity to take a sophisticated broadcast production environment out on the road to connect directly with our customers in their own locality. We know that money is tight and that many organisations simply can’t send as many people to exhibitions like NAB anymore so this vehicle gives us the chance to show the whole production team the benefits of SSL and our partners’ technology. Bringing a mini-NAB to our clients ties in nicely with the way we have designed the product to fit today’s more challenging budgets. The vehicle is equipped to demonstrate a range of broadcast production systems and will be visiting local broadcast stations, sports arenas and houses of worship. This is also a fantastic opportunity for us to visit our extensive network of educational clients to share knowledge and insight with aspiring young audio engineers. We serve up an impressive cup of coffee, too!”

The SSL Broadcast Equipment Demonstration Vehicle, designed by SSL’s Project Engineering team, was built on a 2012 F550 Ford chassis with a custom body and was crafted by leading mobile vehicle specialist Shook Mobile Technology. Russ Berger Design Group (RBDG) provided the acoustic design for the space using both absorbing and diffusing treatments as well as SpaceCoupler technology for the ceiling. The vehicle is presented in association with SSL’s technology partners: Genelec, Miranda, RTS and Savant. The truck demonstrates the capabilities of all of these systems and the integration that is possible between them.
The mobile control room space is completely climate controlled, sound isolated and treated to provide a comfortable and acoustically accurate demonstration environment. The space can accommodate several people and a larger group can watch demonstrations from outside the vehicle via an external audio monitoring system and video display, which is linked to internal cameras.
The audio monitoring system inside the vehicle is a complete Genelec 8020.LSE Espresso 5.1 system, which consists of five Genelec 8020B two-way, bi-amplified active monitors matched with a Genelec 7050B LSE™ Series Active Subwoofer. A pair of 6010A Bi-Amplified Active Monitors for PFL (pre-fade listen) and a pair of 8030A Bi-Amplified Monitors for the outdoor display round out the audio system. A Miranda Kaleido-X16 multi-viewer offers high quality and space efficient monitoring with silent operation, and Miranda’s Densité processing offers simplified signal management using multi-functional modules. An RTS Adam-M system with two key panels is employed for intercom, while a Savant True Image interface handles the vehicle’s lighting and video switching.
The SSL Broadcast Equipment Demonstration Vehicle will visit local U.S. broadcasters, houses of worship, systems integrators, key sports and entertainment events, as well as being showcased at trade exhibitions. The schedule for 2012 begins with demonstrations in Texas, moving on to locations in New Mexico, Arizona and California, stopping in Las Vegas for the NAB Show in April, on to Utah and then the Eastern Seaboard.
You can find out more about the vehicle and the equipment, view a tour schedule (with interactive map) and request a stop at your location online at www.solidstatelogic.com/worldtour.
Solid State Logic is the world’s leading manufacturer of analogue and digital audio consoles and provider of creative tools for music, broadcast and post production professionals. For more information about our award-winning products, please visit: www.solidstatelogic.com.