General:
Q: What are the limitations of the trial version?
A: There are no functional limitations in the trial version. The only limitation is the 30 days evaluation time limit.
Q: What is the easiest way to upgrade?
A: Simply download and install the new version in your computer, without uninstalling the previous version. DePopper cannot be running during the upgrade (Windows does not allow replacing files in use).
Q: How do I see my version number?
A: Please click here for your answer.
Q: I want to place a link to DePopper in my web site. Is there a PAD file for DePopper?
A: Yes, you can get DePopper PAD file (xml format) here: http://www.droidinfo.com/padfiles/depopper.xml
Q: Will DePopper installation write harmful files to my system directory? Do I have to reboot after installing DePopper? Does DePopper have spywares?
A: No, no and no. DePopper does not write harmful files anywhere in your computer, does not have spywares and is not adware. DePopper setup does not require a reboot.
Q: Does DePopper main screen accept Drag & Drop?
A: Yes. This the easiest way of adding files to the file list, in our opinion. All source files must be in the same folder.
Q: My cat played with my records and now they are full of scratches. Does DePopper remove ALL clicks and pops from my records?
A: DePopper can miss some clicks, particularly the most severe clicks. Please test DePopper with your records during 30 days, before deciding to register.
Q: DePopper works great with my friend's records, but has poor results with the records I have stacked in my basement during 40 years, with rats, bats and ants. This is not fair! Shouldn't DePopper give the same results for ALL RECORDS EVERYWHERE?
A: Definitely NO! DePopper results depend on the source material. For this reason we offer a free trial. Please test DePopper with your records before deciding to register. Don't register based on the results you see with other people, register based on the results you get with your records.
Q: I love PDF format. Does DePopper have PDF documentation?
A: Yes. By default, DePopper 4 installs a shortcut to the PDF manual on Windows Desktop during setup. You can delete the shortcut later, if you do not want it. The PDF manual contains detailed information about all DePopper functions and should be compatible with screen readers.
Registration:
Q: I can't find where to place the key code. I can't see any Register button. Can you help me?
A: Please click here for your answer.
Q: My computer crashed and I can't find my registration data. Will I have to pay for another registration?
A: No, simply contact us and we will give you the data you need.
Q: I'm a registered DePopper user and I keep my key code secret with me. Will the new version accept my registration data?
A: Yes.
Q: I don't want to use / don't have a credit card!
A: PayPal is available. Verotel/TicketsClub form also offers other payment options for US and some countries in Europe.
Q: I want to use PayPal!
A: PayPal is available since Oct 2009 and you can use this option, although we have to disable it from time to time in order to make adjusts in the new interface.
Q: What's your refund policy?
A: If you want a refund (cancel the registration with your money back), please contact us. Don't forget to inform something that lets us identify your payment. DO NOT DENY THE PAYMENT IN YOUR CREDIT CARD BILL OR BANK, because if you deny a payment that you really requested ("chargeback") you actually cause extra losses to us too. Refund is possible for payments made with credit card, if requested up to four months after registration, and for payments made with PayPal, if requested up to 60 days after registration. After you contact us, we will ask the merchant agent to refund you and you should be refunded in your next bill. However, we strongly suggest you to test the software extensively during 30 days and register only if you are sure it works well for your needs and you like it. DePopper is trialware in order to allow you to know exactly what you are paying for. Please test DePopper before registering the program.
Technical:
Q: Which format should I use for recording? What do you have against mp3 and wma?
A: Use uncompressed wav, unless you don't care about quality (but if you don't care about quality, why are you using DePopper?) or if you have pre-recorded files in mp3/wma format. Do NOT record your audio files as mp3 or wma, unless you have strong reasons to do so. Mp3 format uses lossy compression, which changes the clicks in a way that may confuse DePopper clicks detection. Also, mp3 introduces some distortion in stereo files that can become more noticeable after the file is cleaned by DePopper. These problems are inherent to the use of lossy compression in such formats and no program can revert them. Always record as wav, process as wav and only convert to mp3 if you are absolutely sure that you won't process that file anymore. More details here.
Q: Why is Play disabled when I click the Preview button, in Options screen?
A: Please click here for your answer.
Q: I am getting "access denied" messages when I process some files in DePopper. Is there a fix?
A: Yes, download and setup the newest version of DePopper and this problem will disappear.
Q: I haven't used DePopper 2 for some time and now it is requesting the key code again. Why? Should't DePopper keep the key code forever?
A: Please click here for your answer.
Q: I use Windows XP/2000/Vista/Win7 and my computer freezes, shuts down or reboots when I am processing my files with DePopper. What happens?
A: Please click here for your answer.
Q: I have DePopper 2.20 or older and I get an error when I try to process my mp3 files. Only wav files are processed. The log file informs there was an error when opening an AVI file. How can I fix this?
A: Download and setup the newest version of DePopper and this problem will disappear.
Q: When I use the Minimize Hiss filter in the default setting I notice that the hiss disappears during quiet passages, but appears during louder volume passages, to disappear again when low volume or silent passages happen again. Is there a way to eliminate the hiss completely?
A: Please click here for your answer.
Q: I have DePopper 2. I used DePopper normally in the past, but then I did not use it for some months (or years). Now, when I attempt to use DePopper, Windows displays an error message. Why this started to happen now, if DePopper worked well some months (or years) ago and I did not make changes in DePopper?
A: Of course DePopper can do nothing if you are not using it. DePopper has no "quick start" modules or something like that. If DePopper is not in use, nothing in DePopper is working at all. If you did not use DePopper during months, DePopper remained there, completely inactive. But exactly because it was inactive, DePopper was vulnerable to to other ill-behaved programs. For example, some other programs can have erased DePopper permanent data in Windows Registry, or replaced some system files (that Windows use when DePopper needs to execute specific functions, like file parsing), or even damaged DePopper program files. The last option would happen only if your computer was invaded by virus or trojans/rootkits. But the two first options are likely to happen, particularly the replacement or deletion of system files. The replacement of a system file can happen when a new program is installed and its setup has some bug. The deletion of system files is usually done by the user, believing in hoax emails saying that some system file is dangerous and asking to delete it urgently. How to fix: sometimes reinstalling DePopper fixes the problem. If not, an upgrade to a newer DePopper version is necessary, particularly if using Windows XP with Service Pack 3. See our page of upgrades for bug fixes history and download of the latest version of the program.
Q: Is there a limit for the size of the files that DePopper can process?
A: Yes. The temporary and output files should not exceed 2 gigabytes. For 16 bits wav output, this means that the duration of each file (time length) should not exceed 180 minutes (3 hours). For 32 bits wav output the maximum time length for a single file will be 90 minutes. For 64 bits float wav output the maximum time length for a single file will be 45 minutes.
Q: Is there a way to use DePopper with m4a (iPod) files? Can DePopper encode m4a?
A: Please click here for your answer.
Q: Is there a way to use DePopper with flac files? Can DePopper encode flac?
A: Please click here for your answer.
Q: I want to record some songs from a cassette player to my computer, but the sound from the player almost does not have trebles, only tape/player hiss. I want the best possible sound, so what can I do?
A: Please click here for your answer.
Q: How can I process many files in sequence? When I try to add new files to the list, the old files disappear.
A: Please click here for your answer.
Q: In the past I recorded a CD from an LP. It is an audio CD, not a data CD and has all the noises and scratches of the original recording. Is there a way I can clean it up with DePopper?
A: Yes, use other program (there are many) to extract the songs from the CD as WAV files. Then clean them up with DePopper. Extract the files as WAV, not MP3 or WMA, because lossy compressed formats, like MP3 and MPA, decrease the audio quality. Later, if you want, you can convert your processed songs to one of these formats.
Q: What is the purpose of the file named undrnstl.exe that DePopper version 2 writes in the Windows folder? And why this file is not removed when I uninstall DePopper?
A: The file undrnstl.exe is the uninstaller for the now very old versions 1 and 2 of DePopper. The use of this file was deprecated in version 3, released in the beginning of 2009. Uninstalling DePopper does not remove this file because Windows does not allow a file to delete itself, but you can manually delete it anytime you want. Installing version 3 or newer does not create this file anymore.
Q: I have a program that opens wav files written with DePopper 2 but does not open files written with DePopper 3 or newer. What can I do?
A: Upgrade to DePopper 4 or newer, go to Advanced Options, click on WAV (sub-item of Output) on the left and in change the output header format to DePopper 2.
Q: After processing, Depopper says "N% samples exceeded max level in Volume Normalization". What does this mean? Should I be concerned about it? Playback seems to be ok.
A: Please click here for your answer.
Q: I have some audio files that have very, very low level. When I normalize them with DePopper, they sound worse. Why?
A: When the recorded audio level is very low, DePopper normalization amplifies everything in the audio file, including noise and artifacts. If the noise and artifacts were not audible before, they will become audible after normalization. The most effective solution for this problem is to set a higher level when recording. DePopper normalization filters are very useful for adjusting files that have normal average levels. Files with extremely low levels frequently have inherent noise, artifacts and (if the level is too low) distortion. If you amplify something bad, you will get something worse.
Q: I use DePopper 3 or older. After I process a big number of files at once, I see a screen stating "Final report - success" with a list of processed songs. Windows tells me I cannot close this screen because it is waiting for a response for me, but the button is not visible. What can I do?
A: When the Ok button is not visible in the final report because of the number of songs, press ENTER and the final report screen will close.
Q: DePopper worked fine until some weeks ago, but now when I try to process my audio files I see a message like this: "Could not open file myfile_tmp.wav". What happens?
A: Please click here for your answer.