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  • We operate a specialized service for improving sound quality, not voice analysis.

    We operate a specialized service for improving sound quality, not voice analysis. There are many requests for noise removal from the general public, but we have a consultation about "voice analysis" about once a month. This is not basically handled. The only most recent voice analysis The only case I received most recently was "I want you to check whether the conversation content of the voice data has been edited." While checking the audio material, I checked for any editing scars in the areas of concern. It is relatively easy to judge that the one edited by an amateur has a blatant joint. However, when edited by a professional voice specialist, the seams and background noise are completely composited, so even I, a professional, can hardly tell. I couldn't say that the sound source I received had a clear edit. The client is somewhat reluctant to say "I didn't have it" after receiving a guarantee for the need to "find an edit point". For that reason, we basically do not accept it. There are a certain number of consultations from people with hallucinations, but we do not accept them. I have hallucinations due to mental illness or similar symptoms, and I "always hear bad words", so I recorded it on the spot, but there are a certain number of requests to check if it is included, but I have received it. not. It seems that the faint sound in the room may sound like that. Of course, we do not deny the disease or those who are suspected of it. In the case of consultation using the above as an example, in most cases you cannot hear anything even if you actually check the data, increase the volume by several tens of times and cut the noise. (Although we basically handle data confirmation at the time of contact) We cannot accept work that has no room for improvement. Because we are launching a free trial as a business, if we cannot improve 100%, we will have a deficit for the work. It is the same as it is impossible to stretch low resolution photo data For voice restoration, iZotope's RX8 Advanced (2020 latest version) application is mainly used for business. I'm hitting. Since the sound component called the spectrogram meter (the image at the top of the blog) can be graphicized, you can roughly grasp what kind of component is mixed in the state of the sound. However, very small sounds that can be heard or cannot be heard are not converted into data in low-resolution sound sources. Also, because environmental sounds are a mixture of various sounds, in most cases it is not possible to find a specific component in the meter. Sound has similar characteristics to image data. Even if you stretch a low-resolution photographic image on your computer, it will look like a mosaic, and you may have some experience that you don't understand. Sound quality improvement is basically to make the sounds that are heard easier to hear. If you can't hear the target voice even faintly in the audio data, the improvement probability is zero. If you can't see a word in your own recorded voice that tells you what you're saying, even if it's fragmentary, you probably can't clarify the content. At best, a smartphone voice memo or an inexpensive IC recorder can record about 50 cm from the microphone clearly. Attempts to capture evidence of an affair in one corner of the room often fail. Of course, with a recorder (linear PCM recorder) with a high resolution and a built-in high-performance microphone, the improvement probability will increase a little more. I can hear it by myself, but if you want to find out if you can hear it, I recommend that you first ask your family and other close relatives to listen to the recorded data, saying, "I think I can hear something." Summary Voice analysis is basically not accepted If you can't hear the conversation at all when you ask yourself, the improvement probability is zero. Services that improve the sounds you hear Making a small sound louder is similar to stretching coarse photo data We are improving more than 100 hard-to-listen sound sources a year. Please contact us if you have any problems with the sound source.

  • Three principles to keep in mind when recording conversations with a voice recorder

    Three principles to keep in mind when recording conversations with a voice recorder Recording with a voice recorder is very familiar as voice evidence for each business negotiation or dispute, as well as the minutes of a meeting. However, even though I recorded it, I often hear it when I play it back later, the noise is terrible, and there is a lot of reverberation in the room, so I can't hear the contents. The following three points are the main principles to avoid such troubles. 1. Avoid noisy places 2. The distance from the microphone to the mouth is as close as possible 3. Do not put it in your clothes pocket 1.Avoid noisy places A quieter place is recommended when recording conversations. We do not recommend restaurants, cafes, McDonald's, shopping malls, etc. Even in places where you don't mind the sound during normal times, the recordings are different. When I actually record it, there are a lot of crowds around me, such as other people's voices, in-store broadcasts, BGM, footsteps, etc. You can not. In a small cafe, the conversation in the next seat is clearly recorded, so even if you try to translate it later, you can't use it. In fact, many such improvement requests have been sent to this service. In addition, conversations in the car while driving are drowned out by strong engine noise and wind noise, and the probability of being unable to repair is high. 2.The distance from the microphone to the mouth is as close as possible Reduce the distance of the voice recorder microphone from the conversation you want to record. Avoid putting small voice recorders in your clothes pocket. The sound is also loud, and the sound of rubbing against the clothes is heard, and I can't hear the contents after all. This noise is difficult to completely repair because the microphone and clothes are at zero distance. The most trouble to avoid when recording with a voice recorder, which drowns out important conversations. If you can get the consent of the person you are talking to, place it on a table at a distance from each other. If that is difficult, put it in a second bag that you don't mind even on the table. Of course, if you cover it with a thick cloth, you will not be able to record well, so we recommend that you have a mesh pocket. Of course, if you want to use the other party's voice as evidence, don't forget to point the tip of the microphone toward the other party. Even if there is a physical distance to the performer who announces the content you want to record, such as a conference or lecture, install the voice recorder near the speaker or closer to the performer. In a large venue, the echoes in the venue are strong, and even if you can record beautifully, there are cases where you cannot hear it at all due to the echoes. 3.Prepare high-performance products IC recorders for conversation recording can be purchased for around $ 30 to 80, but if you check the functions carefully, there may be a noise cut function, or there may be a large spec difference even though there is not much price difference. In most cases, old-fashioned voice recorders are inconvenient because they cannot be connected to a computer to transfer data. Even if you own an old model, you should introduce a new model if you are planning to use it for trials or to transcribe it reliably. Summary How was that. I run a sound quality improvement service called Hybrid Sound Reform, but there are many inquiries about "I can't hear the recorded content of voice memos." In some cases, it can be improved, but their success rate is around 50%. There are many sound sources that even professional professionals cannot fix. I wrote this article for those who have the opportunity to record important conversations. #Voicerecorder #ICrecorder #Conversationrecording #Minutes #Voicememo #Recording #Noise #Trial #Divorcetalks