G-Stomper User Manual - PLANET
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1. Meadi im 03 09 2015 Page 3 yy G Stomper User Manual V 4 4 13 1 3 Manual Latency Compensation Latency Compensation means in general that if the known Audio Latency is 200ms then the recorded Triggers or Notes get still placed at the right location G Stomper automatically transforms all tapped events to the latency aware timing Depending on your device there is a more or less significant unknown Latency part On some devices this is not even noticeable but on others it can be up to twice as much as the known Latency part Note To reduce the unknown Latency part to a minimum use the OpenSL Audio System see Chapter OpenSL Support for lower Latency A too big unknown Latency part results in the situation that your recorded events are always placed a bit too late in the sequence e g 1 Step delayed To get rid of this delay G Stomper provides a Manual Latency Compensation setting in the Setup Dialog PLAY MENU 909 RS SCROLL MODE BAR m Lu o wi 2 ej w N Nn GEN Ul AUD Manual Latency Compensation This setting can be used to compensate additional latency which is not known by the application e g display reaction time If your live recorded Triggers Notes are always a bit behind the beat then and only then you should adjust this value A good start is to set the value to the middle then live record again check the recorded Triggers Notes then adjust the value again until you find2. operating system and app dependent A good part of it can be optimized from inside the app as long as the hardware and operating system allows it The Audio Output Latency can vary from 35ms up to over 250ms G Stomper automatically compensates the known part of the Audio Output Latency during the live recording process But since only one part of the Audio Output Latency is known by the application it is not always possible to compensate the complete Latency If this is the case your recorded events might always placed a bit too late in the sequence e g 1 Step delayed To get rid of this delay G Stomper provides a Manual Latency Compensation setting in the Setup Dialog see Chapter Manual Latency Compensation You can check your actual known Audio Latency Internal Latency in the Audio section of the Setup dialog PLAY MENU MODE ao lu oO pan G N a E GEN Audio Internal Audio Format 32bit 44100Hz Stereo Native Output Audio Format 16bit 44100Hz Stereo Current Internal Latency 39ms The final latency the time from pushing a button until you hear a sound can be longer since it also depends on the reaction time of your touch screen and on the Android internal post processing Audio System AudioTrack stable Internal Latency If you notice stuttering noise select a higher internal Latency Normally this is not required but in some rare cases increasing the Latency may help
3. the moment you press a button or a piano key until you hear the sound from the speakers The latency is a combination of two main factors e Control Input Latency e g display reaction time e Audio Output Latency 13 1 1 Control Input Latency e g display reaction time The Control Input latency is the time from the moment you touch the screen or an external MIDI Keyboard until the audio system gets notified by the Android OS to do something It is influenced by various factors which strongly depend on your device and Android version It can vary from a few milliseconds up to 300ms or even more Since the Input Latency is not known by a particular application there s no way for G Stomper to automatically compensate it In most cases especially on newer devices you don t have to care about the Input Latency since Touch Screens got much faster over the last few years But on older devices the Input Latency may be an issue If this is the case your recorded events are always placed a bit too late in the sequence e g 1 Step delayed To get rid of this delay G Stomper provides a Manual Latency Compensation setting in the Setup Dialog see Chapter Manual Latency Compensation 03 09 2015 Page 2 yy G Stomper User Manual V 4 4 13 1 2 Audio Output Latency The Audio Output Latency is the time from the moment when an application starts to play a sound until you hear it from the speakers The Audio Output Latency is hardware
4. the optimal setting for your device Oms Sample Rate As higher the Sample Rate as more CPU is used to generate the audio output The Sample Rate also directly affects the amount of Tracks and Voices you can use concurrently Higher Sample Rate Better Quality more CPU Load less concurrent Tracks Voices Note By default this value is set to zero Do not change it if you don t have problems with the event placement while live recording Only if the recorded Triggers Notes are always behind the beat then you should adjust this value A good start is to set the value to the middle then live record again check the recorded Triggers Notes then adjust the value again until you find the optimal setting for your device 03 09 2015 Page 4 SS G Stomper User Manual V 4 4 13 1 4 Audio Latency may cause Silent Recording Silent Recording is automatically enabled if your audio Latency is higher than 40ms to check your Audio Latency see Chapter Audio Latency Silent Recording means in other words that you won t hear the played sounds while you tap sound in in real time while in recording mode Let me give you an example to make this clearer If your device has an Audio Latency of 70ms not regarding the Display Latency in this context and you d live record the sounds in real time then you would hear the sounds 70ms delayed On the other hand the audible playback of the existing Sequence is also 70ms delayed When
5. S 909RS 909RS 909 RS 909 RS SCROLL MODE STEP SEQUENCER Note In the same way Live Rhythm ARP Recording can be used on the Sampler Drum Pads 03 09 2015 Page 8 yy G Stomper User Manual V 4 4 13 4 Live Note Recording Sampler Main Drum Machine Select the Track you want to record PLAY SCROLL MODE BAR i o STEP SEQUENCER Enable the Note Edit Mode PLAY 2 om 909 RS SCROLL MODE i gt rele Eog NOTE EDIT BAR STEP SEQUENCER Press Record and Play to start recording Optionally you can long press the Record Button to enable the Metronome Click Now while the sequencer is running and recording tap the Notes in using the Piano Keys PLAY 2 om s09 RS SCROLL MODE A Arar Eog NOTE EDIT c lt m STEP SEQUENCER 03 09 2015 Page 9 yy G Stomper User Manual V 4 4 13 5 Live Note Recording VA Beast VA Beast related screens Select the VA Beast Track you want to record SEL MENU STEP EDIT Press Record and Play to start recording Optionally you can long press the Record Button to enable the Metronome Click C5 SEL MENU STEP EDIT 03 09 2015 Page 10
6. ord and Play to start recording Optionally you can long press the Record Button to enable the Metronome Click Now while the sequencer is running and recording tap the beat in using the Track Button s T07 PLAY _909RS fl 909RS f 9090rs f so9rs f s09RS f so9rs f 909RS f 909 RS f so9rs f so9RS A 909 Rs f 909RS fE gt Je BAR KO STEP SEQUENCER Note In the same way Live Drum Recording can be used on the Sampler Drum Pads the Sampler Note Grid and the Sampler Track Grid 03 09 2015 Page 7 yy G Stomper User Manual V 4 4 13 3 Live Rhythm ARP Recording Sampler Main Drum Machine Drum Pads Select the Track you want to record and make sure the R Arp Stutter switch is set to R Arp PLAY SCROLL MODE BAR STEP SEQUENCER Optionally if you want to record multiple Tracks at once you can set the Track Pad Mode to R Arp see Chapter Sampler gt Sampler Track Pad Mode nr SCROLL MODE o BAR STEP SEQUENCER Press Record and Play to start recording Optionally you can long press the Record Button to enable the Metronome Click Now while the sequencer is running and recording touch and or move the R Arp fader to record the Ryhthm Arpeggio Additionally if you have set the Track Pad Mode to R Arp you can use the Track Pads to play record the Rhythm Arpeggio on multiple Tracks 909 RS 909 RS 909 RS 909 RS 909 RS 909 RS 909 RS 909 R
7. tput Audio Format 16bit 44100Hz Stereo Current Internal Latency 39ms The final latency the time from pushing a button until you hear a sound can be longer since it also depends on the reaction time of your touch screen and on the Android internal post processing Audio System AudioTrack stable AudioTrack stable r OpenSL lower latency experimental How low the lower latency actually is depends on your device In most cases it will be 20 40ms on Android 4 x and 10 20ms on Android 5 x Important Note Keep in mind that the G Stomper Low Latency integration is still in experimental state There s no 100 guarantee for its stability If you notice audio glitches or even worse no sound at all then you should switch back to AudioTrack The best available devices regarding Audio Latency are the Google Nexus Smartphones and Tablets A Nexus 9 for example runs without problems with an internal latency of 10ms on OpenSL 03 09 2015 Page 6 mn G Stomper User Manual V 4 4 13 2 Live Drum Recording Sampler Sampler related screens Select the Track you want to record for beat recording this is optional you can also record any other track but if it s selected you ll see the recorded Steps immediately TO7 SCROLL BAR STEP SEQUENCER Set the Track Pad Mode to Play see Chapter Sampler gt Sampler Track Pad Mode TO7 PLAY 909 RS Je el b Eog BAR STEP SEQUENCER Press Rec
8. you record in real time then you intuitively place notes to match with the current playback So when you push a pad at the same time you hear an existing kick drum then the kick drum is at 7Oms latency your tap is at 70ms latency and the final audible output of your tap is at 70 70ms Due to this delay it would more confusing than helpful to real time playback a sound while recording if the audio Latency is higher than 40ms Therefore the real time playback of the entered sounds is disabled during the recording process Even if silent recording is applied you ll of course hear the recorded sounds but only when the sequencer went through the loop cycle and comes to the already recorded steps Note To reduce the Latency to a minimum use the OpenSL Audio System see Chapter OpenSL Support for lower Latency 03 09 2015 Page 5 yy G Stomper User Manual V 4 4 13 1 5 OpenSL Support for lower Latency Audio Latencies less or equal 40ms are possible on 1 4ghz Quad Core or higher devices running on Android 4 2 or higher in use of the new experimental OpenSL integration To switch to the OpenSL Audio System open the Setup dialog PLAY MENU MODE BAR STEP SEQUENCER and change the Audio System setting to OpenSL lower latency experimental Note The Audio System setting does only show up if your device provides Low Latency Support GEN Internal Audio Format 32bit 44100Hz Stereo Native Ou
9. yy G Stomper User Manual V 4 4 G Stomper Studio G Stomper Rhythm G Stomper VA Beast User Manual App Version 4 4 Date 03 09 2015 Author planet h com Official Website http www planet h com Contents 13 ve RENN aranna 2 13 1 Live Recording and L tene siissssciciccsscicssdsacacnensavivesenwsncandsasiexscorccsecnviteranacndwananes 2 13 1 1 Control Input Latency e g display reaction time rrarnrnvrarnnrnnrnnnnrnnrnnnnrnernnnnnnnennrnsnnnn 2 22 FONN eee ener ere ee ene a ee eee ee 3 13 1 3 Manual Latency Compensation arrarnarnnvnrnnrnnrnnnnrnnrnnvnrnnrnnrnnnnennrnnnnennrnnrnnnnennnnenuennrnsnnen 4 13 1 4 Audio Latency may cause Silent RECOrING ccccsceecseeeseeeeseceeeeteeeeeseeseesusetatsessneesenanees 5 13 1 5 OpenSL Support for lower Latency arrarvnrnnvavrnrnnnanrnvnnnnnennrnnnnnavnnrnnnnnsnvnnnnnnnnnnnnnvnrnnnnee 6 13 2 Live Drum Recording Sampler Sampler related screenS ararananannnnnnnnnnnnnnnnune 7 13 3 Live Rhythm ARP Recording Sampler Main Drum Machine Drum Pads 8 13 4 Live Note Recording Sampler Main Drum Machine ananannnnnnnnnnnnnnnnnnnnnnnnnnnnnnune 9 13 5 Live Note Recording VA Beast VA Beast related screensS ararananannnnnnnnnnnnunn 10 03 09 2015 Page 1 Sy G Stomper User Manual V 4 4 13 Live Recording Live Recording basically means to tap your sequences in while the sequencer is running 13 1 Live Recording and Latency Latency is the time from
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