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However, the Konnekt 24D's trick and it is perhaps no surprise to those familiar with TC's Powercore system is the inclusion of some DSP effects processing. The two key elements of this are the Fabrik C channel strip and the Fabrik R reverb.
Versions of both these plug-ins are available for the Powercore system, but their combined list price for that format is not dissimilar to that of the Konnekt 24D itself.
The inclusion of DSP processing makes the 24D an intriguing proposition. The Konnekt 24D is both compact and sturdy enough to be used on the move — with suitable care and attention, I'd have no qualms about using it outside a studio environment. The front panel features two balanced Neutrik 'Combi' XLR jacks with individual gain controls and a global switch to engage phantom power. Both also feature a 20dB pad switch and a three-stage input-level LED.
As with similar units, this metering lacks a little subtlety but is better than having to rely solely on software meters. A switch is also provided for toggling channels one and two between the front-panel inputs and the rear-panel line input jacks. The 'monitor' section contains two large knobs labelled Source level and Output level respectively.
As described below, the former can be configured to control a number of different aspects of the 24D's features. The inclusion of a dedicated output volume control is most welcome, as it quickly becomes irritating to rely on a mouse for adjusting overall playback volume. Finally, two headphone outputs are included, one of which automatically mutes the main output.
The simple Near Control Panel Mixer page. The power button is positioned on the rear panel — fine for desktop use, but not so convenient if you wanted to rack the 24D. Used with a six-pin Firewire port the 24D is bus powered, but a power supply is included for use with a four-pin port more common on laptops or when the unit is used in stand-alone mode without a computer. The TC Near Control Panel application is included and provides access to all the additional functions of the unit.
As far as I can tell, the bundled version here is functionally identical but uses the host computer's CPU and is only available when the 24D is connected to the system. Finally, an excellent PDF manual how often do the words 'excellent' and 'manual' appear in the same sentence when referring to hi-tech equipment?
The manual covers both the 24D and its junior sibling, the Konnekt 8 see the 'Small Konnektions' box. I tried the unit on a further desktop computer and a laptop each with different Firewire interfaces and experienced similar difficulties — either no connection or stuttering audio. Thinking I had simply been sent a faulty unit, TC Electronic kindly sent me a second 24D but I had exactly the same problems with this.
I finally overcame the issue by installing a new Firewire interface a Belkin PCI card into my main test system, at which point both 24Ds worked first time of asking. Coincidentally, at the end of this process I happened to take delivery of a new PC laptop and the 24D also worked flawlessly with that.
TC Electronic's Thomas Valter confirmed that there are a small number of Firewire chip sets that can be problematic with the 24D and that these are the same as for the Powercore system.
Potential purchasers might want to test the 24D with their own hardware prior to purchase but, with PCI Firewire cards being relatively inexpensive, the issue can be easily solved. And, as detailed towards the end of the main text, given the subsequent performance of the interface, I found that overcoming these initial teething problems was well worth the effort.
I initially experienced some difficulties getting the Konnekt 24D to function correctly see the 'Firewire Chip Set Compatibility' box for a brief summary but once these had been overcome the unit performed flawlessly. While I'm sure there are more esoteric and expensive audio interfaces out there that would produce better absolute figures, the 24D is more than up to the task for most mobile, home or project studio applications.
The impression from my own subjective playback and recording tests was overwhelmingly positive. Both the line and headphone outputs reproduced a range of commercial material very well. The stereo imaging was good and mixes sounded clear and detailed. There was also plenty of level on the headphone outputs.
Recordings made via the line inputs were clean, while the mic-preamps produced excellent results and, via the pad and gain controls, are capable of dealing with a very wide range of input signal levels. This is arranged in a number of tabbed screens, including the System Settings screen, which allows the buffer size to be set and also provides a very useful 'Check For Updates' function if the host computer is connected to the Internet.
This will update both software and the 24D's firmware as required. The well designed Mixer page allows all the input sources to be balanced and also includes a fader for the DAW output and overall output. Each channel features a send control, enabling some ambience to be applied via the Fabrik R processor, while an instance of Fabrik C is available for channels one and two. The channel one and two inputs are auto-sensing and the graphics change depending upon the type of jack inserted — a nice touch.
Mixer settings can be saved via the File button located at bottom right and three presets can be loaded and instantly recalled via the P1-P3 buttons, duplicating the function of the DSP total recall buttons on the 24D's front panel. The Setup page provides some additional system-type settings and also allows the input pairs to be linked or unlinked for stereo or mono operation.
This page is also where the front-panel Source level control is configured. The Setup page includes options for configuring the Source level control. Fabrik C provides a combination of processing suitable for a voice channel. This includes four-band EQ, compressor either full-band or three-band , de-esser and limiter. While the EQ control set follows a familiar format and both the de-esser and limiter offer a single control each, the compressor is controlled in a rather novel fashion.
Four circular icons — labelled 'S', 'G', 'C' and 'L' — are positioned on screen to set the compression controls see screenshot, above right. The 'S' icon is used to specify the type of audio source from a grid of options with choices including vocals, solo instruments and different types of mixes. Selecting the 'G', 'C' or 'L' icons changes the display to a triangular graph, the corners of which represent the high, mid and low bands of the compressor.
As an example, dragging the 'L' icon to the top of the triangle sets a high level for the mid-band compressor and reduces the level on the low and high bands. The 'G' gain and 'C' compression controls operate in the same way. MINT or not, this does take a little getting used to, but fortunately there is a decent enough collection of presets for Fabrik C to get you started. What is clear, however, is that the sound of the processor is very musical. Four icons — 'R' reverb , 'C' colour , 'M' modulation and 'D' distance — allow the user to tweak the nature of the reverb further.
As an example, the 'R' icon changes the reverb pre-delay and decay times, while the 'D' icon changes the balance between the dry, early reflections and main reverb signals. Again, this does take a little getting used to but the supplied presets help. While I don't imagine the 24D contains anywhere near the same amount of processing power as some of TC's high-end processors, there are some very useable reverbs here.
Given the price of the 24D, the inclusion of such a respectable reverb processor is quite a big plus. A pair of Aux inputs allows other signals to be monitored through the Konnekt 8, but these signals cannot be recorded. At the price it offers excellent audio quality, but I think the extra outlay for the Konnekt 24D is well worth making. While the features and sound quality of the 24D are undoubtedly impressive in their own right, the advantages of the design are really hammered home when the unit is hooked up to your DAW.
When tracking in Cubase 4 , the convenience of having both a channel strip and reverb available without having to patch in additional hardware or resort to software monitoring through Cubase makes the whole recording process considerably easier. When tracking, Fabrik R serves as an excellent monitoring reverb — you can give the performer some ambience in their headphones but record the dry signal.
The same is also true of Fabrik C — when engaged, its processing is monitored but doesn't have to be recorded. However, the 24D actually features a number of virtual output pairs that are fed via Firewire to the host DAW. As shown in the screen shot below, in Cubase , channels one and two provide an unprocessed signal while, for example, channels five and six provide a signal processed by Fabrik C but not Fabrik R.
By selecting which input pair feeds your audio track you can chose which signal to record — dry or processed.
For microphone-sourced recordings, I found this flexible and extremely convenient. While we would all like to be getting our vocal and acoustic instrument sounds exactly right at source rather than applying processing, it's not always possible in a non-ideal acoustic space.
I found this particularly useful to brighten up recordings of my acoustic guitar, an instrument I always have trouble with in my own studio. The 24D made this task a breeze. The 24D sends a number of virtual audio channels to the host computer via the Firewire connection. For example, taking your audio input from the first stereo pair allows you to monitor through Fabrik C while recording dry.
In contrast, the third stereo pair records the signal including any Fabrik C processing. A recent firmware update for the 24D means that the effects are not, however, limited to the tracking phase of a project.
This provides a single instance of each effect in your DAW. Most obviously, Fabrik C might be used as an insert on an individual audio track, while Fabrik R could be placed in an effects channel and used as a send and return reverb.
This worked a treat, and having access to Fabrik R while mixing, without CPU overhead, is a real plus. My only other comment would be that the drivers seem very solid. I was able to work with a comfortable buffer of samples in some quite complex Cubase 4 projects, giving both low latency and reliable performance. Testing within other audio applications — Sound Forge , Acid Pro and Wavelab — produced equally good results.
TC confirmed that drivers for Windows Vista are in the early stages of testing. At the time of writing, no release date has been confirmed. At this price point, I have no complaints about the audio quality: it sounds very good and will be more than a match for the acoustics of most mobile, home and project studio environments.
The close integration of the DSP effects is, as far as I'm aware, unique, and in one simple step TC have removed the need to patch in external hardware during tracking. This integration is such a neat idea that I assume other manufacturers will follow suit — but until then the Konnekt 24D offers a very novel twist that, for me, adds a really competitive edge. Given the complete package on offer, it is difficult not to see the 24D as excellent value for money.
Indeed, so impressed was I by the combination of facilities offered by the Konnekt 24D that I bought the review unit. Highly recommended. The simple ideas are often the best and I can only imagine that other manufacturers will consider following TC's lead.
Pros Very good audio quality. Integrated DSP effects are excellent. Provides all the essential processors required for tracking in a single box. Hardware and software bundle represents excellent value for money. Cons Worth checking Firewire compatibility before purchasing.
Rear-panel power switch a bit irritating. Buy PDF version. Previous article Next article. New forum posts Re: How do you choose a Horn driver?
TC Electronic Konnekt 24D
Despite its slightly limited effects, the Konnekt 24D is an audio interface of the highest calibre. TC have just made your purchasing decision that bit more difficult. Speaking of connectivity, the front panel offers two high-quality, dual-purpose, phantom-powered XLR mic or hi-Z guitar instrument inputs and two headphone jacks the topmost of which automatically disables the main audio out when a jack is inserted - perfect for recording. Installation of the supplied TC Near software is completely painless although we had to download one of the plug-ins separately and works immediately in your favourite DAW.
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TC Electronic Konnekt 24D review
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