diff -ur ttaenc-3.4.1-src/ttaenc.c ttaenc-3.4.1-src-shntool/ttaenc.c
--- ttaenc-3.4.1-src/ttaenc.c	2007-07-26 21:02:53.000000000 -0400
+++ ttaenc-3.4.1-src-shntool/ttaenc.c	2007-07-29 02:16:31.000000000 -0400
@@ -609,6 +609,25 @@
 	}
 }
 
+void fseek_cur(FILE *f,long bytes)
+{
+	long bytes_curr, bytes_total;
+	unsigned char buf[XFER_SIZE];
+
+	bytes_total = bytes;
+
+	bytes_curr = min(bytes_total,XFER_SIZE);
+
+	while (bytes_curr > 0) {
+		if (bytes_curr != fread(buf,1,bytes_curr,f))
+			tta_error(READ_ERROR, NULL);
+
+		bytes_total -= bytes_curr;
+
+		bytes_curr = min(bytes_total,XFER_SIZE);
+	}
+}
+
 int compress(FILE *fdin, FILE *fdout) 
 {
 	int *p, *data, tmp, prev;
@@ -659,15 +678,19 @@
 		}
 
 		input_byte_count = output_byte_count = offset;
+
+		tmp = 0;
 	} else {
-		fseek(fdin, 0, SEEK_SET);
-		if (ferror(fdin)) tta_error(READ_ERROR, NULL);
+		if (!memcpy(&wave_hdr, &id3v2, sizeof(id3v2)))
+			tta_error(MEMORY_ERROR, NULL);
+
+		tmp = sizeof(id3v2);
 	}
 
 	// read WAVE header
-	if (!fread(&wave_hdr, sizeof(wave_hdr), 1, fdin))
+	if (!fread((void *)&wave_hdr + tmp, sizeof(wave_hdr) - tmp, 1, fdin))
 		tta_error(READ_ERROR, NULL);
-	input_byte_count += sizeof(wave_hdr);
+	input_byte_count += (sizeof(wave_hdr) - tmp);
 
 	wave_hdr.ChunkID = ENDSWAP_INT32(wave_hdr.ChunkID);
 	wave_hdr.ChunkSize = ENDSWAP_INT32(wave_hdr.ChunkSize);
@@ -714,8 +737,7 @@
 	if (wave_hdr.Subchunk1Size > def_subchunk_size) {
 		unsigned int extra_len = wave_hdr.Subchunk1Size - def_subchunk_size;
 
-		fseek(fdin, extra_len, SEEK_CUR);
-		if (ferror(fdin)) tta_error(READ_ERROR, NULL);
+		fseek_cur(fdin, extra_len);
 		input_byte_count += extra_len;
 
 		fwprintf(stderr, L"Encode:\tskiped %ld extra format bytes\n", extra_len);
@@ -738,8 +760,7 @@
 			return 1;
 		}
 
-		fseek(fdin, subchunk_hdr.SubchunkSize, SEEK_CUR);
-		if (ferror(fdin)) tta_error(READ_ERROR, NULL);
+		fseek_cur(fdin, subchunk_hdr.SubchunkSize);
 		input_byte_count += subchunk_hdr.SubchunkSize;
 
 		memcpy(chunk_id, &subchunk_hdr.SubchunkID, 4);
@@ -886,6 +907,7 @@
 	unsigned int framelen, lastlen, fframes;
 	unsigned int framesize, st_size, *st;
 	unsigned char *data;
+	int tmp;
 
 	// clear statistics
 	input_byte_count = output_byte_count = 0;
@@ -912,14 +934,21 @@
 		len += 10;
 		if (id3v2.flags & (1 << 4)) len += 10;
 
-		fseek(fdin, len, SEEK_SET);
+		fseek_cur(fdin, len - sizeof(id3v2));
 		input_byte_count += len;
-	} else fseek(fdin, 0, SEEK_SET);
+
+		tmp = 0;
+	} else {
+		if (!memcpy(&tta_hdr, &id3v2, sizeof(id3v2)))
+			tta_error(MEMORY_ERROR, NULL);
+
+		tmp = sizeof(id3v2);
+	}
 
 	// read TTA header
-	if (!fread(&tta_hdr, sizeof(tta_hdr), 1, fdin))
+	if (!fread((void *)&tta_hdr + tmp, sizeof(tta_hdr) - tmp, 1, fdin))
 		tta_error(READ_ERROR, NULL);
-	else input_byte_count += sizeof(tta_hdr);
+	else input_byte_count += (sizeof(tta_hdr) - tmp);
 
 	// check for supported formats
 	if (ENDSWAP_INT32(tta_hdr.TTAid) != TTA1_SIGN) {
@@ -998,7 +1027,7 @@
 }
 
 int decompress(FILE *fdin, FILE *fdout) {
-	int *p, *data, value;
+	int *p, *data, value, tmp;
 	unsigned int num_chan, data_size, byte_size, checksum;
 	unsigned int buffer_len, framelen, lastlen, fframes;
 	unsigned int k, depth, unary, binary = 0;
@@ -1016,6 +1045,7 @@
 	// skip ID3V2 header
 	if (!fread(&id3v2, sizeof(id3v2), 1, fdin))
 		tta_error(READ_ERROR, NULL);
+
 	if (!memcmp(id3v2.id, "ID3", 3)) {
 		int len;
 
@@ -1031,14 +1061,21 @@
 		len += 10;
 		if (id3v2.flags & (1 << 4)) len += 10;
 
-		fseek(fdin, len, SEEK_SET);
+		fseek_cur(fdin, len - sizeof(id3v2));
 		input_byte_count += len;
-	} else fseek(fdin, 0, SEEK_SET);
+
+		tmp = 0;
+	} else {
+		if (!memcpy(&tta_hdr, &id3v2, sizeof(id3v2)))
+			tta_error(MEMORY_ERROR, NULL);
+
+		tmp = sizeof(id3v2);
+	}
 
 	// read TTA header
-	if (!fread(&tta_hdr, sizeof(tta_hdr), 1, fdin))
+	if (!fread((void *)&tta_hdr + tmp, sizeof(tta_hdr) - tmp, 1, fdin))
 		tta_error(READ_ERROR, NULL);
-	else input_byte_count += sizeof(tta_hdr);
+	else input_byte_count += (sizeof(tta_hdr) - tmp);
 
 	// check for supported formats
 	if (ENDSWAP_INT32(tta_hdr.TTAid) != TTA1_SIGN) {
diff -ur ttaenc-3.4.1-src/ttaenc.h ttaenc-3.4.1-src-shntool/ttaenc.h
--- ttaenc-3.4.1-src/ttaenc.h	2007-07-26 21:20:15.000000000 -0400
+++ ttaenc-3.4.1-src-shntool/ttaenc.h	2007-07-29 00:07:27.000000000 -0400
@@ -87,6 +87,9 @@
 #define _MAX_FNAME	1024
 #endif
 
+#define min(a,b) (((a)<(b))?(a):(b))
+#define XFER_SIZE 262144
+
 #define LINE "------------------------------------------------------------"
 
 #ifdef _BIG_ENDIAN