First I'm having a problem with high end sounds (crashes, hats, chime,etc.) I get a lot of digital distortion. I lower the volume and I still get it. More so now that have began converting my mp3 in higher bitrates.
Second, when I use vibes or organs, I get this unwanted echoing distortion.
How can I fix these?
When you convert from mp3 to wave you will have some sound loss. Doing the reverse you won't.
When you convert from mp3's what are the bitrates of the mp3 files? When you convert them to wave what is the converted wave bitrate?
You have to remember that converting from smaller to larger bitrates can cause drastic sound stretch that may cause this problem. If you have to convert, it's always better to go from bigger to smaller as opposed to smaller to bigger. Taking an mp3 that is 128, changing the file type and increasing the bitrate to say wave 320 is a no no!
I'll give you an example of what you're doing digitally! Say you have a jpg(picture) that's only 100x100 pixels. You make it larger to say 500x500. Look at the image after you've converted that.....jacked up huh? Now take a jpg 500x500 and make it smaller. It's smaller but you have the same clarity...maybe even better! It's the same concept for music. Going from bigger to smaller=Good, going from extremly small to bigger= very possible distortion.
If you have to convert a mp3 that's 128 to wave, convert it to wave 128 or 192...no larger. If it's distorted at 192 take 'er down.
Let me know if this helps.