User manual PRESONUS GTX44

[. . . ] GTX44 Four Channel Gate/Expander User's Manual VERSION 1. 1 PreSonus Limited Warranty PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser. To be protected by this warranty, the purchaser must complete and return the enclosed warranty card within 14 days of purchase. [. . . ] Therefore the cymbals may be removed from ` eligibility' by using a high cut filter to filter out the high frequencies of the cymbals. The gate will no longer open up during cymbal crashes, leaving the low frequencies of the tom-tom to properly open the gates. Threshold The gate threshold sets the level at which the gate opens. Essentially, all signals above the threshold setting are passed through unaffected, whereas signals below the threshold setting are reduced in level by the amount set by the ratio and/or range control. Ratio The expansion ratio sets the amount of noise reduction applied to a signal once the signal has dropped below the expansion threshold. For example, a 2:1 expansion ratio attenuates a signal 1dB for every 1dB it drops below the threshold. Ratio' s 4:1 and higher act like a noise gate. Note: The Range Control overrides the ratio control. For example: If the Expander calls for 40dB of attenuation but the Range is set to 20 dB of attenuation, the signal will be attenuated by 20dB. Range The range is the amount of gain reduction that the processor closes down to. Therefore, if the range is set at 0dB, there will be no change in the signal as it crosses the threshold. If the range is set to -60dB, the signal will be attenuated (reduced) by 60dB, etc. Attack The gate attack time sets the rate at which the gate opens. A fast attack rate is crucial for percussive instruments, whereas signals such as vocals and bass guitar require a slower attack. Hold Hold time is used to keep the gate open for a fixed period of time following the signal going below the gate threshold. This can be really useful for effects such as `gated snare'where the gate remains open after the snare hit for the duration of the hold time then abruptly closes. Hold is only available when the ratio knob is set to GATE. Release The gate release time determines the rate at which the gate closes. Release times should typically be set so that the natural decay of the instrument or vocal being gated is not affected. Shorter release times help to clean up the noise in a signal but my cause ` chattering'in percussive instruments. Longer release times usually eliminate `chattering' and should be set by listening carefully for the most natural release of the signal. SC Mon The SideChain Monitor allows you to hear the frequency range that the Lo and Hi Filter are operating on. Link Using the Link function, you can link together two channels of the GTX44 for stereo operation. [. . . ] Noise Gating Noise gating is the process of removing unwanted sounds from a signal by attenuating all signals below a set threshold. As described above, the ` gate' works independent of the audio signal after being `riggered' by the t signal crossing the gate threshold. The gate will remain open as long as the signal is above the threshold. How fast the gate opens to let the `good' signal through is determined by the attack time. [. . . ]