Under tone poppy sounds?

Sounds like your airstream.

I'm not sure if I'm hearing the same under-tone that you are, but it sounds like something in the recording process to me. The fact that you aren't hearing it until playback points to the recording process as being the culprit too. Did you experiment with different sample rates? LowBlow mentioned airstream, could it be that the mic is too close and is getting hit by the airstream? The playing sounds good though, I like it.

I used my Zoom recorder with standard wav settings. I also had the foam cover over the mikes and it was about 10 feet away from the flute.

Thanks Charles.

I have a Zoom H2, and have noticed it tends to accentuate the sound of air-stream, even at some distance, compared with other recorders. i don't know what you mean by "popping sounds" (unless you mean the whistle tones at the end of notes sometimes?) but the recording definitely had that air-stream + sound i usually find from the Zoom.

Chuck, I also use a Zoom H4 but don't have those problems. If I had to make a guess, it sounds like you are in a reverberant space, but your sound cuts out rather quickly at the end of the note. In other words, it doesn't have the same reverberant tail that it has when adjacent notes are joined together. That might suggest that you have some kind of noise canceling set up on the device. If that isn't the case, then I would try recording at the highest sample rate in MP3 setting and use one of the mic modellers in the device. The Neumann U87 works well. Make sure auto gain is off and your limiter/compressor is set to off as well. If the problem persists, I would then suspect the device. Does yours take external mics? If so and you have access to two mics that are the same, try those. Depending on the type of mic, you might need phantom power turned on.

uitgewist

Thanks for all the info. I'll try comparing the original wav to the MP3 and see if the noise came from the conversion. I used Audacity and exported to MP3. I'll also check the settings on my zoom 4.

Again thanks all and I'll let you know how it comes out.

Chuck, I'd be interested to know if the conversion to mp3 in Audacity is an issue too. I recently sent out some sound files recorded with my usb mic, Blue Snowball, in a room with good acoustics using Audacity. They all had kind of an old tape hissing sound in them that I puzzled over... maybe its the conversion.

Audacity uses LAME to convert to MP3. I've been told LAME is pretty good but I'll let you know when I can do a side by side comparison.

ok, I compared the original WAV file and it did not have the poppy sound was not there. Then I exported it in Audacity again with the highest settings and in the new MP3 was the same sounds.

I downloaded a audio file converter called Switch Sound File Converter. I ran the original WAV through it and the final MP3 did not have the poppy sound. I don't know that this Switch Sound File Converter is any better than other converters but it's free and seems to make a better sounding MP3 than Audacity does.

I am going to check and see if there's an updated LAME DLL that can be used with Audacity but for now I can get the file converted in a clean manner.

Wow, good to know, Chuck!

Another update, I was able to find an updated version of the LAME dll for Audacity. I found Lame_v3.98.3_for_Audacity_on_Windows at http://lame.buanzo.com.ar/. When I installed that version I'm no longer getting the popping noise in the Audacity export to MP3. I'm not sure what version of the LAME dll I had but I've been running Audacity for year and it could have been quite old.

So, either updating Audacity's MP3 dlls or getting a stand alone converter is what helps.

Thanks for everyone's help!