fix typo

README.md

@@ -29,7 +29,7 @@ And a [document](https://yikai-liao.github.io/symusic/) is also available. Not c
 * `.numpy()` method for getting [SoA](https://en.wikipedia.org/wiki/AoS_and_SoA) data
 * `.filter(func, inplace)` method for filtering objets in all the "List" in symusic
 * A new synthesizer is now available! It comes from our another project [prestosynth](https://github.com/lzqlzzq/prestosynth).
-  Find usages in our document. Note that we will support more features of soundfont for sythesizing in the future.
+  Find usages in our document. Note that we will support more features of soundfont for synthesizing in the future.
 
 ## Installation
 ### Use pre-compiled version
@@ -49,8 +49,8 @@ pip install ./symusic
 ### Parsing MIDI
 
 * test using [mahler.mid](https://github.com/lzqlzzq/minimidi/blob/main/example/mahler.mid) from minimidi/example on my laptop (i7-10875H, 32GB 2666MHz DDR4 RAM, Linux 6.1.69-1-lts)
-* Note that mahler.mid is quite a large midi file. So this benchmark mainly relects the `parsing time` (the percentage of time of loading file gets more significant when file is smaller)
-* `midifile` is writen in cpp, and could parse midi files to both `event level` and `note level`. It is slow mostly becuase of `iostream`.
+* Note that mahler.mid is quite a large midi file. So this benchmark mainly reelects the `parsing time` (the percentage of time of loading file gets more significant when file is smaller)
+* `midifile` is writen in cpp, and could parse midi files to both `event level` and `note level`. It is slow mostly because of `iostream`.
 * `mido` is writen in pure python, and only parses midi files to `event level`
 * `pretty_midi` and `miditoolkit` is based on `mido`, and parse midi files to `note level`
 * For libraries written in python or with python bindings, we use `timeit` to measure the time cost of parsing the midi file. `nanobench` for cpp libraries and `BenchmarkTools` for julia libraries.