Dist COLDFIRE is a title whose name combines an effect category with what appears to be a circuit or product reference, and the catalogue should establish which title it names before publishing, since the distortion category contains several fundamentally different device types and the specific circuit determines both the character and the correct use. The distinctions are worth stating, because they are what a buyer needs in place of a name. A tube-based distortion generates predominantly even-order harmonics and compresses as it saturates, giving the warm quality associated with valve equipment, as documented on SSL's X-Saturator, which emulates an analogue circuit introducing either second-order valve style or third-order transistor style distortion or a blend of the two — and the developer's explanation of the blend is worth carrying: the harmonics control selects 2nd or 3rd order distortion or a blend, a drive control sets the drive level, a depth control the amplitude of the distortion and a shape control adjusts whether the distortion has smooth or hard edges, with a headroom button providing an additional 6dB of headroom so heavily boosted signals can be created without digital clipping. That control set is a complete description of what a distortion needs, and catalogue entries for distortion products are best written against it: what harmonics are generated, how hard the circuit is driven, how much of the generated content is mixed back, and how abrupt the distortion curve is. A transistor or diode-based distortion generates odd-order harmonics and produces a harder edge, which is a different sound rather than a stronger version of the same one. And a bit-reduction or sample-rate-based distortion is a third category entirely, since it quantises rather than saturates — and the market documents both approaches, with XLN Audio's RC-20 Retro Color allocating them to separate modules, where Distortion covers saturation and Digital handles bit reduction and sample-rate degradation, which is the correct separation, since the two are not interchangeable and are chosen for different purposes. The emulation market's conventions should guide how the entry is written. Black Box Analog Design HG-2 documents the approach its developer took, with the hardware designed as a line level stereo unit to add saturation, harmonics, natural compression, increased RMS and enhancement during mixing and mastering, using all-tube gain stages and custom wound transformers to add harmonics directly and in parallel, with the plugin adding Input Gain, Density, Calibration, Air and Mix, and a Calibration menu that mimics an internal trim adjustment in the hardware to give high frequencies Dark, Normal or Bright coloration. SPL's Iron documents a variable bias tube compressor with a parallel dual tube circuit combining two tube types, custom Mu-Metal Iron Transformers, a feed-forward resistive Vactrol-Opto-Isolator, and six different rectifier settings. And Devious Machines' Infiltrator 2 documents the modular approach, including a huge suite of effects processors with 54 different modules, many with multiple sub-types, plus a dedicated master compressor section and a compressor effect both sporting 4 different models, an overdrive section with 12 grit-tastic models available both as a regular effect module and in a dedicated master drive section which can be placed before or after the main effect chain — the modern pattern where a distortion is one module among many and its position in the chain is a user decision. The catalogue should verify the circuit or mechanism modelled, whether the product is a standalone plugin or a module within a host instrument, and whether it includes a wet/dry mix for parallel use, since a dedicated mix control facilitates parallel processing, as documented on SSL's X-Saturator. Suits mix bus and bus saturation, drum and bass processing, vocal thickening and electronic production, depending on which circuit a listing names. #DistCOLDFIRE #Distortion #Saturation #Overdrive #ValveDistortion #TransistorDistortion #DiodeDistortion #BitReduction #SampleRateReduction #EvenOrderHarmonics #OddOrderHarmonics #WetDry #ParallelProcessing #SSLSaturator #BlackBoxHG2 #SPLIron #Infiltrator2 #ProductForm #Mixing #Mastering #MusicProduction #VST #VST3 #AU #AAX