This is from the
DIY Audio Forum, and might be of interest to those building speakers.
HOLMImpulse: Measuring Frequency- & Impulse-Response
Hi,
I have developed a freeware program called HOLMImpulse for speaker gain and phase response measurement.
HOLMImpulse is Non-Commercial freeware with full functionality (No limitations or trial periods) running on Windows XP/Vista
Download HOLMImpulse here
http://www.holmacoustics.com/holmimpulse.phpThe purpose of the application is to:
- Work with any soundcard
- Easy and fast to use
- Measure Frequency-response (gain and Phase)
- Measure Impulse-response
- Dynamically/Automaticly adjust the time window (Gating)
- Use cross-correlation techniques with logsweep, chirp or MLS
- Very good signal/noise ratio (Due to cross-correlation)
- Make bandwitdh limited measurements with no phase-errors
- Measure Harmonic distortion (THD)
- Compare measurements (50 slots, and 3 shown at a time)
- Easy open/save import/export measurements in any format
- Be freeware with full functionality (Up to 192KHz, 24 bit)
- Manipulate measurements (Lowpass, highpass, etc...)
I would like your response
I know that there is no manual, but we are all geeks who rather want features than manuals - right?
- Simply define select your soundcard and click measure
- I would like you to reply in this post and tell me if you have had any success with the program
- And of course post your measurements ;-)
- If you have any difficulties getting this to work, then I'll assist you in this thread
NB I am working for
HOLM Acoustics (A new small Danish Company),
but I have no commercial interest in HOLMImpulse, which is mostly developed in my spare time. The core libraries used in HOLMImpulse are the same as in
HOLMFIR, which is a program used to configure the commercial product DSPre
-F_D
