This discussion focuses on the process of capturing an audio voltage signal using an oscilloscope, saving it as a .csv file, and the subsequent challenge of converting that data back into an audio voltage signal for playback. Participants highlight the necessity of using an Analog-to-Digital Converter (ADC) for capturing the signal and a Digital-to-Analog Converter (DAC) for playback. They also discuss various file format converters, specifically mentioning the use of online-convert.com for converting .csv files to audio formats like MP3, while noting the pitfalls of text-to-speech conversions that misinterpret the data.
PREREQUISITESAudio engineers, electronics hobbyists, and anyone involved in audio signal processing who seeks to understand the conversion between digital data and analog audio signals.
Cool. I didn't know that.anorlunda said:There are many file format converters that can change your data from CSV format to WAV or MP3
I have converted a .csv document into .mp3, however, it just plays the name of every number in the .csv. For example, a number "1000" will be heard in a voice of "one hundred". It can't identify which is the time and which is the amplitude of the waveform.anorlunda said:There are many file format converters that can change your data from CSV format to WAV or MP3 or others. Then you can use any music player on the converted file.
Here is one such program. http://www.online-convert.com/file-type
What are the other formats it can save to? One of them may be more amenable.Tspirit said:an audio voltage signal can be obtained and saved as .csv (or other formats) by oscilloscope.
It can also save to binary format (.bin), or some figure formats such as .bmp, .png. I will try later.NascentOxygen said:What are the other formats it can save to? One of them may be more amenable.
Tspirit said:I have converted a .csv document into .mp3, however, it just plays the name of every number in the .csv. For example, a number "1000" will be heard in a voice of "one hundred". It can't identify which is the time and which is the amplitude of the waveform.
I uploaded my csv file into the website "http://audio.online-convert.com/convert-to-mp3", converted it into mp3 online and downloaded the mp3 file and played it with windows media. By comparing the contents of sound with the original csv file (opened by office Excel), I found they are the same. I mean the voice is not a sound wave varying with the time (I saved a sound wave into a csv file using oscilloscope), but the data itself.anorlunda said:That sounds very strange. How exactly did you convert it?
Edit: An how exactly did you play it to listen?
Tspirit said:I uploaded my csv file into the website "http://audio.online-convert.com/convert-to-mp3", converted it into mp3 online and downloaded the mp3 file and played it with windows media. By comparing the contents of sound with the original csv file (opened by office Excel), I found they are the same. I mean the voice is not a sound wave varying with the time (I saved a sound wave into a csv file using oscilloscope), but the data itself.
Have you ever succeeded in converting a csv file into an audio file with that website?anorlunda said:It seems that you got a text-to-speech conversion instead of a file format conversion. You should try again, paying close attention to options and the small print on the Web page. Or try another conversion site such as the one I linked in #5.
I am willing to help you, but I have no sample file. I'll send you my email address by personal message, lookin your INBOX on PF.Tspirit said:Have you ever succeeded in converting a csv file into an audio file with that website?
That i have been search on Google, it it works with Android ,Tspirit said:I uploaded my csv file into the website "http://www.android-rescuer.com/recover-data-from-android-internal-memory.html", converted it into mp3 online and downloaded the mp3 file and played it with windows media. By comparing the contents of sound with the original csv file (opened by office Excel), I found they are the same. I mean the voice is not a sound wave varying with the time (I saved a sound wave into a csv file using oscilloscope), but the data itself.