Impulse Response Quad Cortex

[Abbie Pilz]

Doesthe Quad Cortex use impulse responses for their cabs

or are they simulations?

I think a lot of the cabs sound great, better than a lot of IRs

I have tried and was wondering if that was because they ae IRs also.

^^^ This. The stock QC IRs tended to sound too dark for me with my studio monitors at home, so I switched to ML Sound Lab to make custom IRs that are much brighter. The ML Sound Lab IRs I created sounded great at home, but then they wound up being too bright when playing live and going into FOH. Your playing environment makes a huge difference.

The Gold Standard of IR packs

Created and mixed by Jens during actual productions using the highest quality equipment, and then field tested for years to make sure they work inside dense mixes like no other IRs on the market.

Jens Bogren Signature IR Pack: Rhythm includes:

Engineered by Jens Bogren, the producer behind some of the biggest acts in metal, the 'Jens Bogren Signature IR Pack' for rhythm guitars aims to help you get the sound of a million-dollar studio at home.

This impulse response pack captures using the exact same cabs, mics, and analog chain you can hear on records by some of the biggest metal acts in the world. But even more importantly, they were engineered by the same producer behind these albums with over 20 years of experience.

Neural DSP develops technology to advance the state-of-the-art in the music industry by at least two decades an order of magnitude earlier. With this very ambitious goal, Quad Cortex, the most powerful floor modeler on the planet, was born. With 2 GHz of programmable digital signal processor (DSP) performance from its quad-core SHARC+ architecture, this ludicrous amount of processing capacity provides limitless sound design possibilities.

The main goal of Quad Cortex was to provide a platform in which musicians have enough sonic and routing options to be creative without any limitations. On thesurface, the product had to look simple and clean, with an intuitive and fun to use graphical user interface (GUI) that abstracts system implementation complexityfrom the end user.

Therefore, it was all about the Neural DSP engineering team working through the hardware and software design challenges so that users can reap the benefits of maximum optionality and versatility, while keeping the experience extremely clean, simple, and enjoyable.

The ADSP-SC58x and ADSP-2158x processor series (hereafter referred to as ADSP-SC589) are members of the SHARC+ family of products. Multicore SHARC+ andArm SoCs deliver high performance, deterministic low latency audio processing capabilities for advanced real-time automotive, consumer, and professional audio market segments. The ADSP-SC589 processor is based on the dual SHARC+ single-instruction multiple-data (SIMD) core and the Arm Cortex-A5 core. These 32-bit/40-bit/64-bit floating-point processors are optimized for high performance audio/floating-point applications with large, on-chip, static random access memory(SRAM), multiple internal buses that eliminate input/output (I/O) bottlenecks, a feature-rich audio peripheral set, and a wide variety of control and connectivity options, asdepicted in the block diagram in Figure 2.

Quad Cortex impulse response-based speaker simulation leverages the on-chip FIR hardware accelerator, freeing up the SHARC+ cores for additionalparallel computations, resulting in enormous core millions of instructions per second (MIPS) savings. Also, the FIR block is great for antialiasing purposes, which is another big need when models of ultrahigh gain, nonlinear systems, such as guitar amplifiers, are required.

The Quad Cortex floor modeler features a massive 7" multi-touch display. A powerful parametric equalizer (EQ) gives users absolute control with amazing ease at their fingertips. Whereas the SHARC+ DSP cores are fully focused on advanced audio processing, the integrated on-chip Arm Cortex-A5 core hosts a Linux operating system used as the main controller of the product, with the userinterface (UI) running on top of it.

Among many of the high end audio processing features, the Neural DSP Quad Cortex architecture supports capturing, sharing, and downloading a musician's favorite rigs' sounds. Equipped with unique biomimetic artificial intelligence (AI) technology, Quad Cortex can learn and replicate the sonic characteristics of any physical amplifier, overdrive, and cabinet with unprecedented accuracy.

Unlike any other, the Neural DSP sophisticated neural network algorithm perceives sound akin to human perception, making it a fabulous natural-sounding capture solution. This process, which is borderline deep learning, is quite computationally intensive. All four available SHARC+ DSP cores, largely based on their exceptionally powerful floating-point processing capabilities, are leveraged to make this processextremely time efficient.

The Quad Cortex SHARC+ project was born as a part of a challenging but entertaining journey. Image rendering for a responsive UI, training neural networks with DSP cores, implementing optimized audio algorithms, developing a cloud platform for wireless preset sharing, and performing firmware updates represent a few of the many challenges faced during the development and creation of this groundbreaking device. Needless to say, it has taken dozens of people years to put this amazing product together, but both Neural DSP and Analog Devices truly believe that it has resulted in a best-in-class piece of pro audio equipment that will help musicians be more creative and inspired than ever!

Douglas Castro, a Chilean-Finnish electronics engineer, musician, and technology entrepreneur, is the co-founder and CEO of Neural DSP Technologies. Before Neural DSP, Douglas founded Darkglass Electronics, a market-leading company in the bass guitar amplification business. In the past decade, he has personally designed or led the development of audio products used worldwide by over 500,000 musicians. He can be reached at do...@neuraldsp.com.

Many modern Cab Sim Pedals such as the TC Electronic Impulse and Two Notes Torpedo C.A.B. M+ feature IR loading, making using IRs easier than ever. You can simply carry all of your favourite presets on your pedalboard.

To put it simply, convolution reverb refers to the simulation of a reverb, echo or the sonic quality of a space using impulse responses. As described earlier, a short sound is played, with the response then being measured and recorded, then recreated using algorithms. Popular convolution reverb plugins include Logic Pro X Space Designer, Waves IR1 and Space by Avid.

As mentioned earlier, convolution reverb is the simulation of ambience using an impulse response. Algorithmic reverb is totally artificial, recreating the effect of ambience by simulating natural echoes, EQ, decay times and other elements.

The impulse response will always go after the amplifier, just like a speaker on a combo or cabinet when paired with an amplifier head. There are a couple of ways you can go about using an impulse response, however.

The second option is to use a hardware unit like the Neural DSP Quad Cortex or Line 6 Helix units. You can import your impulse responses into these units to be used live on stage, allowing you to take your well-crafted tone wherever you want with a minimum of fuss. The way you do this will depend upon your particular unit, but this will be covered somewhere in the manual.

The line between impulse response and cab sim is a little blurry, but typically a cab simulator is used with an actual guitar amplifier, whilst an impulse response will be used with an amp simulator or a floor modeler like the Quad Cortex, Helix, Kemper, or Axe-FX. They both do a similar thing but the use case is ever so slightly different.

Amp modeling is rapidly taking over the world of guitar and whether we're recording at home or playing live, more and more guitarists are turning to amp and cab sims for their guitar tones. Many stock cab sims remain unconvincing, which is where the best impulse responses come in. They allow you to capture the magic of a professionally recorded guitar cabinet, load it into your modeler or DAW of choice, and take that perfect tone from your home studio to rehearsal, to the stage, and back again.

Matt is a Junior Deals Writer at Guitar World and has been playing guitar as his main instrument for well over 20 years. He also plays drums, bass, and keys, producing out of his home studio in Manchester, UK. He has previously worked for Dawsons Music, Northwest Guitars, and freelanced for various magazines and blogs, writing reviews, how-to's, and features. When he's not downloading the latest VSTs or justifying yet another guitar pedal purchase, you'll find him making a racket with Northern noise hounds JACKALS. "}), " -0-10/js/person.js"); } else console.error('%c FTE ','background: #9306F9; color: #ffffff','no lazy slice hydration function available'); Matt McCrackenSocial Links NavigationMatt is a Junior Deals Writer at Guitar World and has been playing guitar as his main instrument for well over 20 years. He also plays drums, bass, and keys, producing out of his home studio in Manchester, UK. He has previously worked for Dawsons Music, Northwest Guitars, and freelanced for various magazines and blogs, writing reviews, how-to's, and features. When he's not downloading the latest VSTs or justifying yet another guitar pedal purchase, you'll find him making a racket with Northern noise hounds JACKALS.

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