The impulse-responses in the VF14M IR Pack records the frequency-response variation in the capsule-tube interface in the U47 microphone: the IR does not incorporate the transfer-function of the microphone capsule or amplifier. The curves are offset by 2dB for clarity only. * Frequency response measured relative to a reference pressure microphone: sound source presented directly on axis with U47 in cardioid condition. Read more about the difference between VF14 and VF14M tubes here. The grid-current of the Phædrus Audio VF14M Electronic Tube TM on the other hand, is carefully designed to match that of Neumann's selected VF14 tubes (marked with the all-important M). The effect of this is quite audible as these impulse-responses will enable you to compare in your own studio. This is because the grid-current is too high with the majority of these tubes and this "sucks charge" off the capsule - thereby reducing bass-response. Unfortunately, old VF14 tubes and the various substitutes based on "button" tubes both display this falling-bass effect (blue trace). Note that the bass response does not fall away in relation to the original Neumann response (black curve - measured with an original VF14M tube). ![]() These curves illustrate the frequency response* of the U47 with the Phædrus Audio VF14M Electronic Tube TM fitted (red curve). The contents of the PHUSION IR Pack is available as a PDF. To get your PHUSION IR Pack download, simply contact and we will send you a link to the download. The PHUSION IR Pack is available as a digital download at four sample rates and bit-depths: So these IRs simply model the frequency-responses of the preamps and the EQ: not their non-linearities. * The impulses in the PHUSION IR Pack were captured using the exponential sweep technique which moves non-linear components into negative time. Impulse responses are available for the four preamp's as well as for a range of EQ settings*. This collection of impulse responses derived from the Phædrus Audio PHUSION enables you to "test drive" the PHUSION in your own studio. Further details are available at from Īvailable impulse-response (IR) downloads You are free to use these impulse responses in any of your own projects (even commercial projects) under the terms of the Creative Commons Attribution-ShareAlike 3.0 Unported Licence. Please check the instructions for your particular convolution software or hardware to discover which file formats which are supported and for the appropriate conversions.Īll the impulse responses in the Phædrus Audio Impulse-Response Library are made available under a Creative Commons (Attribution-ShareAlike 3.0 Unported) Licence. For example, AudioEase Altiverb, Waves IR-1 and McDSP Revolver use proprietary file formats, although they are capable of importing WAV files. ![]() Some software or hardware may need these files to be converted to another file-format before they can be used. Software to unpack the download (ZIP file)Ī Phædrus Audio impulse loaded into Cockos ReaVerbĪll Phædrus Audio Impulse-Response Library files are in uncompressed. ![]() Suitable amp modelling software and/or DAW.To get your impulse response download, simply contact and we will send you a link to the download. Our impulse responses are available as digital downloads at four sample rates and bit-depths: But, for some equipment - notably EQ - the frequency response is the defining factor in the component's performance. Of course, an impulse response only encapsulates the frequency response of the measured equipment not its distortion characteristic. wav format, and require convolution software or hardware to use. The Phædrus Audio Impulse-Response Library is a growing collection of impulse responses derived from our equipment which may be downloaded for you to enjoy, or to demo Phædrus Audio products in your own studio.
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