Thank you for your continued patronage of our products.
We have discovered a defect in the sound quality evaluation function of the O-Solution product you recently purchased. We would like to inform you of the details of the defect and the version update for the affected product as follows. We sincerely apologize for any inconvenience this may cause.
Target Products
| OS-0525 | Sound quality evaluation function | Version 2.0.4 ~ Version 2.1.3 |
| OS-5330 | Professional Subscription | Version 2.0.4 ~ Version 2.1.3 |
Details of the problem
In the sound quality evaluation function, it has been discovered that when calculating TNR (Tone-to-Noise Ratio) and PR (Prominence Ratio) using time-series data with a sampling frequency other than 48 kHz, there are errors in the graph display and exported results.
This bug occurs in versions 2.0.4 through 2.1.3.
Conditions under which the malfunction occurs
In analysis mode, select [Analysis] → [Sound Quality Evaluation] to launch the sound quality evaluation screen.
[Sound Quality Evaluation] On the screen, select time-series data with a sampling frequency other than 48 kHz, and then select TNR and PR as the analysis result output items.
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When sound quality evaluation analysis is performed under the above conditions, TNR and PR are not calculated correctly.
Regarding the impact of this bug
If you perform the TNR (Tone-to-Noise Ratio) and PR (Prominence Ratio) analysis processing of the sound quality evaluation function using data with a sampling frequency other than 48 kHz, and then attempt to display or export the TNR or PR graph, incorrect results will be output.
Below are examples of calculating TNR and PR for time-series data with a sampling frequency of 48 kHz, and for time-series data with sampling frequencies of 51.2 kHz, 64 kHz, 102.4 kHz, and 384 kHz.
TNR method
| Fs | Calculation result (error) | result | |
| Tone1 - 1kHz [dB] | Tone2 - 8kHz [dB] | ||
| 48 kHz | 約 12.10 | 約 9.71 | normal |
| 51.2 kHz | Approximately 12.08 (-0.02) | 約 9.79 (+0.08) | abnormality |
| 64 kHz | 約 12.19 (+0.09) | 約 10.07 (+0.36) | abnormality |
| 102.4 kHz | 約 12.30 (+0.20) | - | abnormality |
| 384 kHz | 約 12.39 (+0.29) | - | abnormality |
PR Law
| Fs | Calculation result (error) | result | |
| Tone1 - 1kHz [dB] | Tone2 - 8kHz [dB] | ||
| 48 kHz | Approximately 23.55 | Approximately 13.39 | normal |
| 51.2 kHz | Approximately 23.98 (+0.43) | Approximately 13.57 (+0.18) | abnormality |
| 64 kHz | Approximately 24.88 (+1.33) | Approximately 14.13 (+0.74) | abnormality |
| 102.4 kHz | Approximately 26.80 (+3.25) |
- | abnormality |
| 384 kHz | 約 31.27 (+7.72) | - | abnormality |
*Please note that due to the calculation specifications, the margin of error will vary depending on the data being analyzed.
Cause of malfunction
In the sound quality evaluation analysis, the data is resampled to 48 kHz during analysis, so when determining parameters, it is necessary to specify the sampling frequency of 48 kHz, which is the sampling frequency used during analysis. However, due to an internal software bug, the calculation was performed using the sampling frequency of the time-series data instead of 48 kHz.
countermeasure
We have fixed a bug in the software. The issue will be resolved by installing the corrected software. The corrected version is Ver.2.1.7.
By reloading the analysis data (with the .datx extension) using the corrected software, the graph display and export results will be correct. There is no need to re-analyze using time-series data.
How to update to the corrected software
The updated software can be downloaded from our website (Ono Sokki- O-Solution Download). Please update your software. If you are unable to download it, please contact your nearest sales office.
How to download
Clicking the "O-Solution Download" button below will take you to the "O-Solution Download" page.
If you are already a registered user, please proceed by clicking the "Login" button. (If you are not yet registered, please proceed to user registration.)
We sincerely apologize for any inconvenience caused to our customers using this product. We intend to further strengthen our quality improvement and management to prevent such problems from occurring again in the future.
If you have any questions, please contact your nearest sales office or customer service center.
