PiанаPhase Interactions Mixer User Manual
Contents
1. amp MIX alter its phase dynamically to the two phase locked groups now what happens when the two phase locked groups contain at the same instant phase inverted signals do they cancel each other out as they re set to phase lock or does one of them alter its phase so they remain phase correlated which one gets preference though A Phase locked groups will optimize the tracks within them to the mix without changing the phase relationships of the tracks within the group So in your case scenario if at given point the two groups are phase inverted Pi will rotate the phase locked groups in phase with each other like they were a single channels Q would you then recommend placing two Pi instances in a row on a channel for the following scenario a Pi grouped set of channels within which you want one of the channels to dominate receive the least amount of phase shifting therefore using the weight knob you mentioned to achieve just that followed by another instance of Pi set to phase lock where one would use the weight knob to set the priority of the whole Pi group against other pi groups to determine which group receives more or less phase treatment A No Placing two instances of Pi on a single track will break it Importance priority of tracks and groups in the mix are determined by volume and weight while weight is adjusting individual tracks Therefore to give higher priority to a whole group simply increase the group gain within2. channels to enhance your mix even further Features e Groundbreaking true multi channel engine dynamically optimizes phase relationships between mix channels for optimal sounding mix e Three mode track grouping for enhanced related instruments and multi mic setup phase correlation optimization e Full Range and Low Frequency global optimization modes e Four mode multi channel phase correlation display enables a unique view of the phase relationships within the mix e Internal inter channel sample accurate routing no complicated side chaining required e Available for Mac amp PC in AAX RTAS VST and AU formats 64 and 32 bits where applies Compatibility Minimum Requirements Mac Intel Mac Dual Core 2GHz or faster 4GB RAM Mac OS X 10 6 x or higher AAX RTAS VST or VST Compatible DAW Minimum requirements PC Intel Duo 2GHz or faster 4GB RAM Microsoft Windows XP or higher AAX RTAS or VST Compatible DAW Installation Mac Unpack the downloaded zip file and run the Pi Installer pkg Select your type of installation and follow the installer s instructions PC Unpack the downloaded zip file and run the Pi Installer exe Select your type of installation and follow the installer s instructions 2013 Sound Radix Ltd All Rights Reserved Insert Pi in the last effect insert slot on every mixer channel of your mix excluding auxiliary channels group buses or the master mix Channels gain plays a significant role when d
3. or other high latency plug in it can t do its magic and it ll displays Sync Errors If you re getting Sync Errors messages Increase the lookahead buffer until they re gone Click on the Sound Radix logo to open the About screen and access this setting Toggles latency reporting to the host for hosts without latency compensation such as legacy Pro Tools LE or systems with limited latency compensation such as Pro Tools TDM Pi needs a 150 ms look ahead to perform its magic Therefore please set your Latency Compensation Engine settings Setup gt Playback Engine to Maximum Due to the limitation of the available delay compensation in TDM systems Pro Tools TDM cannot compensate for the latency required for Pi therefore a delay of 150 ms will be added Please note that in order to keep the tracks in sync it is necessary to insert Pi into all the channels of the mix excluding auxiliaries groups and the master bus Alternately a sample delay plug in could be used Because Pi instances needs to communicate in the background with each other please use a single format of your choice throughout your project file Mixing VST and AU instances in the same project file will break Pi s functionality 2013 Sound Radix Ltd All Rights Reserved Apple Logic Pro Users Due to the unique way Logic processes audio Pi requires longer look ahead and therefore higher latency to guaranty audio stream sync to Pi Therefore you may experience a 50
4. 0 ms audible delay when mangling other plug in parameters in real time Otherwise Logic fully compensates for the latency and playback is not effected MOTU Digital Performer Users DP s Plug in real time preferences has to be set to Real time for Pi to work its magic lity Pi Phase Interactions Mixer Flow Chart Pi Engine 2013 Sound Radix Ltd All Rights Reserved Frequently Asked Questions Q What is the difference between Auto Align and Pi A Auto Align and Pi complement each other Auto Align finds and applies a fixed time shift to eliminate the comb filter that usually occurs with multi mic recordings of an instrument Pi dynamically rotates the phase of the tracks in the mix to improve their phase relationships It s constantly on the move For a multi mic recording Auto Align is more effective across the entire frequency range Pi works its magic on all the tracks in the mix Q Is Pi suitable for electronically generated music Also is the plug in intended to be put on every track or more low frequency related stuff like bass kick drum pads etc A Pi works for pretty much anything you ll throw at it The more interactions and overlapping frequencies you have between your tracks the more impact Pi is going to make on your mix Naturally tracks with more low end content tend to interact more with each other Q Does Pi works well with analog console emulation plug ins such as Slate VCC A Absolutely Q Sa
5. M S mode etc where keeping the recording phase locked is crucial OFF Turns Pi off for all the channels within the group GLBL MODE Global phase relationships optimization mode FR Full Range When set to this mode Pi works to optimize phase relationships across the entire frequency range LF Low Frequency When set to this mode Pi focuses on optimizing the phase relationships frequencies below 800 Hz Display Modes GLBL Global mode Displays the phase relationship of the channel to all the channels in the mix GRP Group mode Displays the phase relationship of the channel to the channels within the group CHNL Displays the overall phase relationships of the channels within the mix Each channel in the mix is represented as a uniquely colored dot on top of a 360 degrees phase correlation and level monitor FREQ Frequency phase correlation meter Displays the phase correlation of the channel across the frequency range Color Identifier Identifies the channel color within the mix in CHNL display mode 2013 Sound Radix Ltd All Rights Reserved PHASE __ I INTERACTIONS Group1 v Drums 0 0 i Wy En A CJF CHNL GAIN GRP GAIN 500 NT P S T 1 de KA ga CHNL WEIGHT GRP MIX MODE ON v 2 Registered to Nir Radix GLBL GLBL MODE Allows the use of larger audio buffers and other high latency plug ins If Pi doesn t get all the samples it needs in time due to a larger audio buffer
6. Pi SoundRadix www soundradix com Technical Support support soundradix com 2013 Sound Radix Ltd All Rights Reserved
7. SoundRadix PHASE INTERACTIONS Group 1 v Drums CHNL GAIN GLBL MODE 2013 Sound Radix Ltd All Rights Reserved Overview Piis an innovative multi channel phase interactions mixer plug in engine for Mac amp PC Pi works to improve the summing of a DAW or a mixer Pi dynamically minimizes frequency cancellations between instruments within the mix improves mono compatibility and brings back the lost depth and focus lost when overlapping frequencies collide Good phase relationships between mixer tracks are a key to great sounding mix Normally where mixer channels are summed into a single stereo mix bus instruments overlap and interact with each other across the frequency range and phase position Often a bass track could be temporarily out of phase with the kick or rhythm guitar tracks and when summed into a mix end up canceling each other over the overlapping frequency range causing a temporary hole in the low end Similarly a snare track could end up sounding thin in a mix when the toms resonance are out of phase with the snare Enter Pi Designed to enhance any mix Pi dynamically rotates the phase of the individual mixer channels to achieve maximum phase correlation within the mix Pi minimizes negative interaction and significantly improves the overall sound of the mix Just drop Pi into the last insert slot of your DAW mixer channels and listen Use any of the 64 groups to bind related instrument
8. etermining the energy of a channel in the mix and the best phase state for the channel In order to achieve maximum efficiency It is recommended to insert Pi into a post fader effect slot when the DAW allows Otherwise use the CHNL GAIN to set the level of the channel and set the volume fader of your DAW to unity gain PHASE I INTERACTIONS Group1 v Drums 0 0 dB P 7 f CHNL GAIN 500 gt NT P INT A on 5 a KA Ne p lt CHNL WEIGHT GRP MIX MODE ON i v p Registered to Nir Radix GLBL GLBL MODE Channel Gain sets the overall gain of the channel The track s energy plays a major role in determining the track s weight within the mix Therefore it is recommended to set the channel gain using the CHNL GAIN or insert Pi post fader where available CHNL GAIN is always active even when GLBL ON is set to OFF to allow level accurate comparison Since gain plays a major role in channels phase influence and sensitivity in a mix some program material can get strongly influenced by other channels in the mix when their level is relatively low or when they decay into lower levels With CHNL WEIGHT It is now possible to manually adjust the channel s low level and overall phase sensitivity and intensity within the mix As CHNL WEIGHT increases the less sensitive and more influential it ll be to other channels in the mix This can help minimize artifacts on some program material especially on low le
9. ll sent them to a single Pi group now is there a way to determine the priority of channels within that group i e for instance determining that the kick drum audio stream receives no selective all pass filtering as you consider that track a crucial element you d not want to have altered instead you d want the other tracks within that Pi group to frequency phase shift when needed if this is not achievable through a setting how does pi determine which audio stream within the group gets preference and thus is not altered is less altered A Weight knob is your friend Tracks with higher weight values are going to have higher priority or gravity in a mix Warning geeky text ahead If you think of a tracks current phase position as a point in space and you have multiple points at various distances from each other and the goal is to minimize the distance between the various points you can achieve the same results by either moving all the points toward one specified point or calculate the best and shortest rout for all the points to another point in space The difference between the two scenarios is that in the first case the point with more Weight is not going to move as much while other points will have to make greater distance Q Say you have three Pi groups where one is set to INT amp MIX and the remaining two are set to phase lock ie you want these two groups to remain intact and have the third group the one set to INT
10. vel mid range sustain notes and tails Global On Toggles all instances of Pi within the mix On and Off 2013 Sound Radix Ltd All Rights Reserved Working With Groups Pi prioritizes channels within a group to allow custom phase optimization configurations Use any of the available sixty four groups to bind related tracks such as multi mic d drum kit or guitar amp DI for optimal phase correlation Grouping can be used to further tune how Pi works on your tracks For example it s possible to phase lock a group of channels so their relative phase is locked while optimizing their sum and the tracks outside of the group to each other Similarly grouping a bass and a kick Pi will optimize them to each other first before performing a second cycle of optimization with the rest of the tracks Group Selection Drop Down Menu Assigns the channel to any of the sixty four available groups Group Name Name that group GRP GAIN Group Gain Adjusts the overall gain of the group GRP MIX MODE Group Mix Mode INT amp MIX Internal amp Mix Optimizes the phase relationships of the channels within the group and the rest of the channels in the mix INT Internal Optimizes the phase relationships of the channels within the group only PL Phase Lock Optimizes the phase relationships of the channels within the group with the mix while keeping the tracks within the group phase locked This mode is suitable for tracks recorded in
11. very thing that EQ added to the track Wouldn t it be like using a linear EQ on everything which is not desirable A Well Pi is not trying to fix the phase shifts within your sound e g it won t make your eq linear but rather make all the tracks in your mix work better with each other If Pi is inserted in the first insert slot it ll optimize the channels phase relationships without taking into consideration the phase changes that has occurred due the processes you have in your channel Q This plug in appears to not like modulation effects like console plug ins with crosstalk emulation on things seems to be moving all over the place unnaturally A Crosstalk emulation probably throws Pi into a mental deadlock It has duplications of all the channels going multiple times into Pis engine If the crosstalk emulation sound is not sample accurate and delayed even by a few samples you re pretty much creating a glorious comb filter effect for all your tracks in the mix Q Why Pi doesn t work with side chains Is there a workaround A When both the side chain source and receive tracks run through Pi it creates a feedback loop in Pi The easiest workaround is to duplicate the side chain source track for triggering only remove the Pi instance from its signal path and use it as the side chain source 2013 Sound Radix Ltd All Rights Reserved Q Say you have inserted Pi on a range of audio channels say these are drum channels and have a
12. y have 2 tracks want to sync the phase on as close as possible If assign both to the same Group and give the main track a weight of 200 and the lesser track a weight of 100 is that the same as assigning the main track a weight of 1000 and the lesser track a weight of 500 Or does the higher weight value also mean the track is more effected A No CHNL WEIGHT is dynamic by nature For the strongest phase correlation just assign the tracks into the same group within Pi and properly set their gain As CHNL WEIGHT increases the less sensitive and more influential the channel will be to other channels phase in the mix Most of the time it s best to leave CHNL WEIGHT at its default minimum value 100 Q already made some grouptracks Drums vocals etc Can t just insert here or do have to make new group tracks within the Pi plugin A No because the tracks are already summed by the DAW group track by the time they get to Pi there will be very little Pi can do from there to help the mix Q would think PI should go FIRST correcting the phase of the raw tracks as if had tracked everything perfectly as opposed to last because there are a number of eqs fx etc that produce desirable phase shift as part their sound vintage eqs phasers stereo wideners etc and if PI is last it is basically fighting to correct the phase shift that have intentionally added by selecting an EQ for it s sound thus undoing the
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