how to equalize headphones for accurate timbre and frontal localization without head tracking скачать в хорошем качестве

how to equalize headphones for accurate timbre and frontal localization without head tracking

The software used in this video is available from the author upon email request. My email address is prominent in the title of the video. If you want to try the software send me an email with your request and I will send a link. The software was written to work with a USB or other audio I/O that communicates with ASIO. I have recently found that ASIO4ALL can be used to run the equal loudness tests. I installed ASIO4ALL on my windows 7 laptop. The headphone app found the ASIO software and ran, putting its output out the headphone jack. You can equalize your speaker(s) with pink noise, and do the speaker and the headphone equal loudness tests. You can then print out the data in headphone_response.txt. I have been unable to play music through the app with ASIO4ALL, but you can enter the correction data into EqualizerAPO and then listen to anything you want. See the instructions in my link about how to use EqualizerAPO. I have a Windows 10 desktop machine with Magix software that came with an ASIO driver called Magix low latency ASIO driver. The machine also has a stereo line input. The app DOES work with the internal Roxio HD audio drivers. I can use the line out for the app output, and the line in for playing music. I added an inexpensive USB headphone DAC, and connected it to the line in on the machine. I could then play music through the app. This video shows in some detail the process of equalizing headphones to achieve truly accurate timbre and frontal localization without head tracking. Frontal localization fails because the ear canal resonances are highly individual. We self-calibrate to the resonances we have - but headphones alter them dramatically. To achieve frontal localization it is essential that the frequency spectrum at the eardrum of the listener from a pair of headphones matches the spectrum at the eardrum from a frontal sound source - in this case a frequency flat frontal loudspeaker. Our method uses the listener's own eardrum as the sensor to make the measurement. It is quick, painless, non-invasive and fun. The program requires a Windows computer, a loudspeaker, and an ASIO compliant sound card such as a MOTU, RME, M-Audio, or Komplet. If you are not sure of the frequency linearity of your speaker the program allows you to equalize the speaker with a smart-phone real-time analyzer (Audiotool) and a calibrated microphone (inexpensively available from Parts Express). Once the speaker is equalized the listener first uses our Windows program to adjust different 1/3rd octave noise bands from the loudspeaker to be the same loudness as a reference band at 500Hz. The procedure is then repeated with a pair of headphones. By subtracting the headphone data from the loudspeaker data the equalization for the headphones is found, and can be immediately heard. It is possible to switch the equalization in and out to hear the difference. For users with Windows 7 or higher there is an app called EqualizerAPO that can be adjusted to provide the new headphone equalization for anything you play. The result is accurate timbre, frontal localization without head tracking - and often fantastically beautiful sound. An important note: I did not mention in the video that if you are using a small stereo speaker such as the Altec in the video, you MUST use STEREO pink noise (setting 1 on the pink noise switch) to calibrate the loudspeaker. The equal loudness test also needs decorrelated noise bands when a stereo speaker is used, which happens automatically if you are driving the speaker in stereo from the program. Above 500Hz you should use stereo noise and not tones for the equal loudness test. Using the tones or the triple tones for the equal loudness test will give erroneous results with a stereo speaker, as the two drivers interfere with each other. One user commented that he had equalized the speaker using mono pink noise and the system did not work. When he used the stereo noise for speaker calibration, and stereo for equal loudness test the system worked very well. He was more than delighted with the results. Please send me your experience with this program. I would like to improve it if I can, and any data you have will be helpful. My email has changed. See the new one at www.davidgriesinger.com