Difference between revisions of "NVGate DSP computation SPU"
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Concerning the "force DSP", it is NOT possible to compute the SPUs loading computation. This is because the computation is not linear. It is more exponential. | Concerning the "force DSP", it is NOT possible to compute the SPUs loading computation. This is because the computation is not linear. It is more exponential. | ||
For high sampling frequency around 40kHz the improvement with force DSP is around 2 times better than normal DSP but for low frequency it can be 20 times better. | For high sampling frequency around 40kHz the improvement with force DSP is around 2 times better than normal DSP but for low frequency it can be 20 times better. | ||
If you have doubt about the computation, we do the test for you, send us your configuration customer.care@oros.com | |||
Revision as of 14:30, 14 February 2022
SPU computation is only working for normal DSP : OR34 V1 - Or35V1 - OR36V1 OR36V22 (normal DSP) - OR38V1 - OR38V2 (Normal DSP).
Concerning the "force DSP", it is NOT possible to compute the SPUs loading computation. This is because the computation is not linear. It is more exponential. For high sampling frequency around 40kHz the improvement with force DSP is around 2 times better than normal DSP but for low frequency it can be 20 times better. If you have doubt about the computation, we do the test for you, send us your configuration customer.care@oros.com
FFT
Computation SPUs:
| Bandwidth | Fdec | Resolution | Envelope | Zoom | SPU/Channel for Real-time |
SPU/Channel for non Real-time |
| 20k | 1 | 401 | No | No | 1 | 0,5 |
| 10k | 1 | 401 | No | No | 0,5 | 0,25 |
| Nk | 1 | 401 | No | No | =N/20 | =N/40 |
| 10k | 2 | 401 | No | No | 1 | 1 |
| 5k | 4 | 401 | No | No | 0,8 | 0,6 |
| 2k | 10 | 401 | No | No | 0,6 | 0,6 |
| 1k | 20 | 401 | No | No | 0,5 | 0,6 |
| Lower than 1k |
Higher than 20 |
401 | No | No | 0,5 | 0,5 |
| 20k | 1 | 401 and below |
No | No | 1 | 0,5 |
| 20k | 1 | 801 | No | No | 1,25 | 0,5 |
| 20k | 1 | 1601 | No | No | 1,5 | 0,5 |
| 20k | 1 | 3201 | No | No | 2 | 0,5 |
| 20k | 1 | 6401 | No | No | 3 | 0,5 |
| 20k | 1 | 401 | No | No | 1 | 0,5 |
| 20k | 1 | 401 | No | Yes | 2 | 1,5 |
| 20k | 1 | 401 | No | No | 1 | 0,5 |
| 20k | 1 | 401 | Yes | Yes | 3 | 3 |
SOA
Computation SPUs:
| Bandwidth (Hz) | Decimation factor | Resolution | SPU/Channel |
| 20 k | 1 | 401 | 3 |
| 10 k | 1 | 401 | 1,5 |
| N k | 1 | 401 | =(N*3)/20 |
| 10 k | 2 | 401 | 2 |
| 5 k | 4 | 401 | 1,3 |
| 2,5 k | 8 | 401 | 1,1 |
| 1,25 k | 16 | 401 | 0,9 |
| 625 | 32 | 401 | 0,8 |
| 313 | 64 | 401 | 0,7 |
| 156 | 128 | 401 | 0,6 |
| 78 | 256 | 401 | 0,6 |
| 20 k | 1 | 401 and below | 3 |
| 20 k | 1 | 801 | 3,25 |
Sampling Frequency: set in Front-End/Inputs settings/Input sampling
FFT Bandwidth: set in FFTx/FFT analysis/range
==
Octave:
| Bandwidth | Fdec | Reso | SPU/Channel for Real-time |
| 25.6k | 1 | 1/3rd | 4 |
| 20k | 1 | 1/3rd | 3 |
| 12.8k | 1 | 1/3rd | 2 |
| 10k | 1 | 1/3rd | 1,5 |
| 20k | 1 | 1/3rd | 3,0 |
| 10k | 2 | 1/3rd | 2,0 |
| 5k | 4 | 1/3rd | 1,25 |
| 20k | 1 | 1/1 | 1,5 |
| 20k | 1 | 1/3rd | 3 |
| 20k | 1 | 1/12th | 6 |
| 20k | 1 | 1/24th | 12 |
Sampling Frequency: set in Front-End/Inputs settings/Input sampling
1/N Oct Bandwidth: set in OCT/FFT analysis/range
OVA
| Bandwidth | SPU/Channel for Real-time |
| 25,6k | 1,25 |
| 20k | 1 |
| 12,8k | 0,75 |
| 10k | 0,5 |
The overall acoustic levels analysis requires 1 SPU per channel at 20 kHz bandwidth. The number of required SPUs is directly proportional to the analysis bandwidth (i.e. the sampling frequency divided by 2.56).