Some UAD plug-ins introduce additional latency within the plug-in itself (in addition to hardware I/O buffering latency) to achieve sonic design goals. When these plug-ins are used in a DAW and/or Apollo’s Console, the additional latency is induced in the signal path. Therefore, they require more compensation to remain perfectly synchronized with other tracks, versus UAD plug-ins that do not have additional latency.
Note: Compensating for the additional latency from these UAD plug-ins is performed automatically by the host software application (DAW and/or Apollo’s Console) when the latency delay compensation function is enabled in the host.
Although the latency added by these UAD plug-ins is negligible (typically between 0 – 100 samples, depending on the plug-in and session sample rate), if this extra latency is not compensated, it can affect phase coherency in a session.
The additional latency values, in samples, of UAD plug-ins with additional latency are listed in the tables below for the benefit of users with plug-in host DAWs that do not perform automatic delay compensation.
For related information, see the “Latency & Delay Compensation” chapter in the UAD System Manual, and the “Latency & Apollo” chapter in the Apollo Software Manuals.
EMT 250 and Lexicon Notes
The EMT 250, Lexicon 224, and Lexicon 480L anti-aliasing filters for their A/D and D/A conversion are not linear-phase filters; therefore the emulations do not have a latency that is the same at all frequencies. Thus, they cannot report to the delay compensation engines a delay that is correct for all frequencies. The reported values are good at low frequencies, but become off at high frequencies.
For example, when the EMT 250 plug-in is in Delay program mode and set with zero delay time and predelay values, the plug-in output will not be completely cancelled when mixing with inverted polarity against an unprocessed track; high frequencies will leak through. However, the latency through the dry side of the wet/dry mix, and the latency when the plug-in is bypassed via the EMT 250 Power switch, do not have this issue and will be fully compensated by the DAW.
Additional UAD Latency Values Table
UAD Plug-In | Sample Rate (kHz) | |||||
44.1 | 48 | 88.2 | 96 | 176.4 | 192 | |
API 550A EQ API 560 EQ API 2500 API Preamp API Vision Channel Strip API Vision Channel Strip Legacy Avalon VT-737sp Channel Strip Century Tube Channel Strip Empirical Labs Distressor Empirical Labs FATSO Jr./Sr. Fairchild 660 Fairchild 670 Helios Type 69 Hitsville EQ Hitsville EQ Mastering Manley Massive Passive Manley Reference Microphone Preamplifier Manley Variable Mu Manley VOXBOX Moog Multimode Filter Moog Multimode Filter XL Neve 1073 Neve 1084 Neve 2254 E Neve 2254 E Dual Neve 33609 C Neve 88RS Neve Preamp Oxide Tape Precision Maximizer Pultec EQP-1A Pultec MEQ-5 Studer A800 SSL 4000 E Preamp & Channel Strip SSL G Bus Compressor Thermionic Culture Vulture UA 610-A UA 610-B UA 1176 Rev A UA 1176AE UA 1176LN Rev E UA 175B UA 176 V76 Preamp |
55 | 55 | 88 | |||
Helios Type 69 Harrison 32C Neve 1073 Legacy Neve 1081 Neve 31102 Precision EQ Pultiec EQP-1A Legacy Pultec-Pro Legacy Pultec HLF-3C SSL E Channel Strip Legacy Trident A-Range |
31 | 13 | 0 | |||
Teletronix LA-2 Teletronix LA-2A Teletronix LA-2A Gray Teletronix LA-2A Silver |
56 | 56 | 89 | |||
Capitol Chambers Hitsville Reverb Chambers |
320 | 752 | 1504 | |||
Bermuda Triangle | 88 | 80 | 20 | |||
Fender ‘55 Tweed Deluxe | 119 | 201 | 284 | |||
Ibanez Tube Screamer TS808 TS Overdrive |
88 | 80 | 0 | |||
Korg SDD-3000 Delay | 119 | 183 | 344 | |||
Little Labs IBP | 32 | 14 | 1 | |||
MXR Flanger/Doubler | 31 | 0 | 0 | |||
Ocean Way Studios | 192 | 688 | 1568 | |||
Raw Distortion | 44 | 40 | 0 | |||
LA-6176 Signature Channel Strip | 110 | 110 | 176 | |||
AKG BX 20 | 983 | 974 | 2078 | 2060 | 4156 | 4120 |
Ampex ATR-102 | 2262 | 2455 | 4408 | 4798 | 8818 | 9598 |
Precision Limiter | 64 | 69 | 129 | 140 | 259 | 281 |
Precision Multiband | 15,360 | 16,896 | 30,720 | 33,792 | 61,440 | 66,048 |
Lexicon 224 (see note at the beginning of article) | 84 | 79 | 90 | 97 | 107 | 116 |
EMT 250† (see notes) | 75 | 11 | 85 | 24 | 107 | 50 |
Lexicon 480L (see note at the beginning of article) | 121 | 64 | 177 | 174 | 289 | 284 |