Crane Song HEDD-192 A/D D/A Converter Details
The Crane Song HEDD-192 is a premium quality 2-Channel A/D D/A converter with the unique ability to add Crane Song's signature "color" to the signal. HEDD is an excellent choice for the discriminating engineer who is looking for that extra, glorious "something" to glue a mix together and to tickle ears in all the right ways.
HEDD, short for harmonically enhanced digital device, is a technological break through in signal processing. HEDD is engineered to provide musically pleasing sound with the capability of generating tube/analog sounds in the digital domain.
HEDD gives any user who works with digital the ability to sound less digital and more analog. Applications include: CD preparation, work station input and output, DAT machine A/D and D/A convertor replacement and effects generation ( warming or changing sounds in the digital domain). HEDD can be used in tracking, mixing, and mastering.
The front panel controls allow the user to select input source, sample rate, and continuously variable triode and pentode sounds. The HEDD can operate as an effects device or as separate A/D and D/A convertor with the harmonic generation process applied to either the A/D or D/A convertor.
The signal processor performs 24 Bit Processing on digital or analog source. HEDD has transformerless balanced analog inputs and outputs, transformer isolated digital inputs and outputs, and uses separate power transformers and supplies for the analog and digital sections. The unit is 1 rack space tall and operates from 110V, 115V, 230V or 240V mains.
Crane Song HEDD-192 A/D D/A Convertor Features
- High Quality 24 Bit A/D and D/A Convertors
- 24 Bit Processing
- Adjustable Triode, Pentode and Tape sounds
- Digital I/O, AES and S/PDIF
- External WC Sync Input and Output
- Since June/early July 2006, all units are shipping with 192kHz converters - both D/A and A/D and 192kHz software/firmware!
Crane Song products are produced in a "small batch", boutique fashion and certain pieces may require a short wait while others are ready to ship right away. Regardless, what you receive in the end is well worth any wait! So, be sure to plan ahead of that next project and give us a call – We’ll make sure that you are taken care of.
The triode function creates a triode like harmonic structure. This process contains strong even order harmonics, but is not strictly even order. This affects the bottom of your signal by fattening it up and it should be noted that even order harmonics are difficult to hear. The harmonic structure changes with signal level and the amount of process being applied, just like it does in a tube and the analog world.
The pentode function creates mostly third harmonic information but contains some higher order odd harmonics depending on the signal level and the amount of process. It is like driving a pentode into over = load. The pentode process makes things sound brighter, and brings out detail. This can also be described as a compression effect. The pentode process affects the triode process because the two processes are in series.
The tape function emulates magnetic recording tape. Tape distortions are odd harmonic, starting with the third and fifth. As you increase the level on tape the harmonic content increases and higher odd harmonics are added. A tape recorder also contains record and reproduce equalizers that modify the harmonic content. The result is a sound that fattens up the bottom and midrange of a recording and as you increase the process. There can be loss of hi frequencies with respect to low frequencies if driven far enough, and the high frequencies start compressing sooner then the low frequencies. This is a result of the compression function and eq. curves in the process. The compression also squashes peaks and results in a higher average level. The tape process is in series after the triode and pentode processes and thus modifies them both.
Crane Song HEDD-192 A/D D/A Convertor Specifications
- Analog Output: Transformer-less balanced floating stereo output with XLR connectors. Digital zero is +16dBm. This allows 12 db of headroom above a +4dBm 0 VU. Gain adjust trims are on the back panel
- Analog Input: Transformer-less balanced floating stereo with XLR connectors. Digital zero is +16dBm. This allows 12 db of headroom above a +4dBm 0 VU. Gain adjust trims are on the back panel
- Word Clock Input: BNC connector takes a TTL level signal at the sample rate to sync the A\D to the external sample rate. HEDD will sync from 20 kHz to 192K kHz. The input impedance is 75 ohms.
- Word Clock Output: BNC connector this is a TTL level square wave that can be used to provide sync to other equipment. The WC output will be the selected sample rate or the rate of the WC input.
- Internal Sample Rate: 44.1kHz TO 96kHz determined by front panel switch.
- S/PDIF Input: Unbalanced digital input 75 ohms RCA connector
- S/PDIF Output: Unbalanced digital output 75 ohms RCA connector
- AES Input: Balanced digital input 110 ohms XLR connector
- AES Output: Balanced digital output 110 ohms XLR connector
- Power: 25 watts at 115 or 230 volts, 50 or 60 Hz. Fuse size is MDL .3A for 115 volts; MDL .25A for 230 volts
- Pilot Lamp: # 7335
- Shipping Weight: 15 lbs (6.7kg)
- Depth Behind Panel: 10 inches (25.4cm) plus user input/output connectors
- The Convertors: HEDD uses high Quality 24 Bit A/D and D/A Convertors made by
- CRYSTAL semiconductor, with an upgrade path to 192K sample rate
Crane Song HEDD-192 A/D D/A Converter Downloads
What We Think - Crane Song HEDD-192 Review
"The more I use the Crane Song HEDD-192, the more I love it. Usually, familiarity breeds contempt, but Dave Hill and the folks at Crane Song really made a piece of gear that has a special place in the 'gear hall of fame' (whenever someone gets around to building that institution). HEDD's ability to add that all important overall glue and character across the stereo mix while also having the ability to provide amongst the most pure conversion possible, makes it one of the most flexible stereo A/D D/A converters anywhere. I'll say this for it - it sure doesn't sound digital. The only thing to watch out for, and I had the same experience with the Color knob on the Egret, is that once you get a taste of what the Triode, Pentode, and Tape modes can do, you want to step on the gas and go and never look back. Since the gain range is fairly wide and high for these modes, which can provide a full thickening as well as certain 2nd and 3rd order harmonics, it is possible for a good thing can be overdone. So, it's good to keep a little bit of a governor on your desire to flat out crank the knob. Little adjustments can make very subtle changes. It's something for the engineer who wants to really dial it in, but do so quickly. There are a couple of really fantastic 2-channel mastering quality converters available out there. And if you're on the hunt for one to put in your studio, the Crane Song HEDD-192 should definitely be on the short-short list."
Alan Moon - Front End Audio
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